'78 GMC SC 454/T400 long to short bed build - The 1947 - Present Chevrolet & GMC Truck Message Board Network

superchevy · 01-02-2021, 07:43 PM

restoring a nice '78 GMC Sierra Classic...plans are tu cut it down to a short bed, new paint, refresh the interior, reseal the 454, add tbi and a 4L80e...maybe some other mods. Here's a pic of it as found in the backyard of the original owner in San Antonio about 3 years ago...and back at my place.

superchevy · 01-02-2021, 07:48 PM

I traded the bed off it for a set of 67-68 buddy bucket seats.

superchevy · 01-02-2021, 07:53 PM

about 6 months ago I took the 78 to buddy's chassis shop, where we cut it down to a short bed.

superchevy · 01-02-2021, 08:02 PM

now it's Jan 2021 and time to build it...rolled into the shop...working on the rear of the truck first...I still need to trim off 5" of the rear of the frame so the short bed will fit...i did get the rear crossmember relocated forward...here's a pic of the 1" lift shackle...that's right, I'm going up instead of lower on this one....now for a new diff cover, brake lines ordered, new rear brakes, some paint

superchevy · 01-03-2021, 07:47 PM

Got a little done today...cut 5.25" off the rear frame rails so the short bed will fit ....removed the diff brake lines...waiting on new ones from inline tube...removed the 2 piece driveshaft and carried bearing support...removed an exhaust hanger that's in the way of relocating the rear fuel tank...

evan · 01-03-2021, 09:01 PM

Looks cool. How much did you take out of the center of the frame? 14"? Do you have any pictures of the inside of the weld? I'm thinking of trying the same thing and wondering about options for reinforcing it.

Edit: What I mean is, do you have any pictures of the inside of the frame where it was welded? Any more of the measuring/cutting process would be great too.

**Willowrun** · 01-03-2021, 11:53 PM

Interested in watching your progress.

SCOTI · 01-08-2021, 11:53 AM

Quote:

Originally Posted by superchevy

now it's Jan 2021 and time to build it...rolled into the shop...working on the rear of the truck first...I still need to trim off 5" of the rear of the frame so the short bed will fit...i did get the rear crossmember relocated forward...here's a pic of the 1" lift shackle...that's right, I'm going up instead of lower on this one....now for a new diff cover, brake lines ordered, new rear brakes, some paint

Curious about this.... What brand did you use? Did the shackle fit the leaf properly?

superchevy · 01-09-2021, 06:01 PM

Hey SCOTI, not sure yet as haven't installed it yet. I've got to rebuild the front suspension and install some new front springs with coil spring spacers...I need to see what the front end height is before I do the rear....limited options on the front for 2wd

SCOTI · 01-10-2021, 01:42 PM

Quote:

Originally Posted by superchevy

Hey SCOTI, not sure yet as haven't installed it yet. I've got to rebuild the front suspension and install some new front springs with coil spring spacers...I need to see what the front end height is before I do the rear....limited options on the front for 2wd

I bought/used some Western Chassis units that required 're-shaping' so they would work. Was curious if it was isolated or if it was more common.

superchevy · 01-17-2021, 09:07 PM

Got a little time to work on her today....what do you do when the shoes are up in the drums and the adjuster hole plugs are rusted in? You get the angle grinder out and some access to the shoes/springs/retainers....

superchevy · 01-17-2021, 09:10 PM

after getting the drums off, I could get the axles so I could replace the bearings and seals...simple right? mr. cross shaft pin said not so fast....ugh

superchevy · 01-17-2021, 09:13 PM

finally got the new bearings and seals installed....now to get some new brake hardware and finish the rear...

superchevy · 01-24-2021, 06:20 PM

with the new axle bearings and seals in, and a new diff lock bolt installed, I was able to get the new diff cover on and filled this weekend....also got the new shoes and brake hardware installed....getting closer

superchevy · 02-24-2021, 09:28 AM

Got the rear brake lines run, rear leaf springs and u bolts back together, new shocks and hardware

superchevy · 02-24-2021, 09:30 AM

the rear of the chassis is now complete and detailed...time to move to the front

superchevy · 02-24-2021, 09:32 AM

Finally got nearly all of the new suspension and steering parts in

superchevy · 02-24-2021, 09:34 AM

time to get the front clip disassembled...got a start on it last night

JJH Jimmy · 02-24-2021, 01:25 PM

Quote:

Originally Posted by superchevy

after getting the drums off, I could get the axles so I could replace the bearings and seals...simple right? mr. cross shaft pin said not so fast....ugh

I think every open diff that I took apart that bolt was broke? The work on the back end looks great!

superchevy · 02-24-2021, 04:07 PM

Thanks! I got lucky on that bolt, lol. I was able to use a pick and rotate it out. Should've bought a lottery ticket that day!

superchevy · 02-28-2021, 06:16 PM

got the front clip fully disassembled and the 454/T400 out to rebuild

superchevy · 02-28-2021, 06:20 PM

today started stripping the interior...

superchevy · 03-02-2021, 09:35 AM

I got the passenger door disassembled yesterday evening. I think I'm going to reuse the lower carpet/panel trims as both sides are near mint.

superchevy · 03-02-2021, 09:36 AM

door panel carpet

SCOTI · 03-02-2021, 10:15 AM

This is coming completely apart

01-02-2021, 07:43 PM	#1
superchevy Got big-block? Join Date: Jul 2000 Location: Austin, Texas Posts: 2,453	'78 GMC SC 454/T400 long to short bed build restoring a nice '78 GMC Sierra Classic...plans are tu cut it down to a short bed, new paint, refresh the interior, reseal the 454, add tbi and a 4L80e...maybe some other mods. Here's a pic of it as found in the backyard of the original owner in San Antonio about 3 years ago...and back at my place. Attached Images __________________ '68 CST SWB factory 396/T400 buddy buckets, a/c, ps, pb '72 Corvette convertible 454/4spd/ac, ps, pb '73 GMC Sierra Grande short wide 454/T400 ps, pb, ac '77 K5 Blazer black on red, 350/T350/NP205 ps, pb, ac all original '78 GMC Sierra Classic short wide 454/T400 ps, pb, ac '72 GMC Sprint SP454. 1 of 38 built. '73 GMC Sprint SP454. 1 of 71 built. '75 GMC Sprint SP454. 1 of 25 built. SOLD! '72 GMC K25 4x4 468/4L80e/NP205 build thread http://67-72chevytrucks.com/vboard/s...23#post4324423 SOLD!'55 Chevy gasser 496/4spd build thread http://67-72chevytrucks.com/vboard/s...96#post4324396

01-02-2021, 07:48 PM	#2
superchevy Got big-block? Join Date: Jul 2000 Location: Austin, Texas Posts: 2,453	Re: '78 GMC SC 454/T400 long to short bed build I traded the bed off it for a set of 67-68 buddy bucket seats. Attached Images __________________ '68 CST SWB factory 396/T400 buddy buckets, a/c, ps, pb '72 Corvette convertible 454/4spd/ac, ps, pb '73 GMC Sierra Grande short wide 454/T400 ps, pb, ac '77 K5 Blazer black on red, 350/T350/NP205 ps, pb, ac all original '78 GMC Sierra Classic short wide 454/T400 ps, pb, ac '72 GMC Sprint SP454. 1 of 38 built. '73 GMC Sprint SP454. 1 of 71 built. '75 GMC Sprint SP454. 1 of 25 built. SOLD! '72 GMC K25 4x4 468/4L80e/NP205 build thread http://67-72chevytrucks.com/vboard/s...23#post4324423 SOLD!'55 Chevy gasser 496/4spd build thread http://67-72chevytrucks.com/vboard/s...96#post4324396

01-02-2021, 07:53 PM	#3
superchevy Got big-block? Join Date: Jul 2000 Location: Austin, Texas Posts: 2,453	Re: '78 GMC SC 454/T400 long to short bed build about 6 months ago I took the 78 to buddy's chassis shop, where we cut it down to a short bed. Attached Images __________________ '68 CST SWB factory 396/T400 buddy buckets, a/c, ps, pb '72 Corvette convertible 454/4spd/ac, ps, pb '73 GMC Sierra Grande short wide 454/T400 ps, pb, ac '77 K5 Blazer black on red, 350/T350/NP205 ps, pb, ac all original '78 GMC Sierra Classic short wide 454/T400 ps, pb, ac '72 GMC Sprint SP454. 1 of 38 built. '73 GMC Sprint SP454. 1 of 71 built. '75 GMC Sprint SP454. 1 of 25 built. SOLD! '72 GMC K25 4x4 468/4L80e/NP205 build thread http://67-72chevytrucks.com/vboard/s...23#post4324423 SOLD!'55 Chevy gasser 496/4spd build thread http://67-72chevytrucks.com/vboard/s...96#post4324396

01-02-2021, 08:02 PM	#4
superchevy Got big-block? Join Date: Jul 2000 Location: Austin, Texas Posts: 2,453	Re: '78 GMC SC 454/T400 long to short bed build now it's Jan 2021 and time to build it...rolled into the shop...working on the rear of the truck first...I still need to trim off 5" of the rear of the frame so the short bed will fit...i did get the rear crossmember relocated forward...here's a pic of the 1" lift shackle...that's right, I'm going up instead of lower on this one....now for a new diff cover, brake lines ordered, new rear brakes, some paint Attached Images __________________ '68 CST SWB factory 396/T400 buddy buckets, a/c, ps, pb '72 Corvette convertible 454/4spd/ac, ps, pb '73 GMC Sierra Grande short wide 454/T400 ps, pb, ac '77 K5 Blazer black on red, 350/T350/NP205 ps, pb, ac all original '78 GMC Sierra Classic short wide 454/T400 ps, pb, ac '72 GMC Sprint SP454. 1 of 38 built. '73 GMC Sprint SP454. 1 of 71 built. '75 GMC Sprint SP454. 1 of 25 built. SOLD! '72 GMC K25 4x4 468/4L80e/NP205 build thread http://67-72chevytrucks.com/vboard/s...23#post4324423 SOLD!'55 Chevy gasser 496/4spd build thread http://67-72chevytrucks.com/vboard/s...96#post4324396

01-03-2021, 07:47 PM	#5
superchevy Got big-block? Join Date: Jul 2000 Location: Austin, Texas Posts: 2,453	Re: '78 GMC SC 454/T400 long to short bed build Got a little done today...cut 5.25" off the rear frame rails so the short bed will fit ....removed the diff brake lines...waiting on new ones from inline tube...removed the 2 piece driveshaft and carried bearing support...removed an exhaust hanger that's in the way of relocating the rear fuel tank... Attached Images __________________ '68 CST SWB factory 396/T400 buddy buckets, a/c, ps, pb '72 Corvette convertible 454/4spd/ac, ps, pb '73 GMC Sierra Grande short wide 454/T400 ps, pb, ac '77 K5 Blazer black on red, 350/T350/NP205 ps, pb, ac all original '78 GMC Sierra Classic short wide 454/T400 ps, pb, ac '72 GMC Sprint SP454. 1 of 38 built. '73 GMC Sprint SP454. 1 of 71 built. '75 GMC Sprint SP454. 1 of 25 built. SOLD! '72 GMC K25 4x4 468/4L80e/NP205 build thread http://67-72chevytrucks.com/vboard/s...23#post4324423 SOLD!'55 Chevy gasser 496/4spd build thread http://67-72chevytrucks.com/vboard/s...96#post4324396

01-03-2021, 09:01 PM	#6
evan Registered User Join Date: Jul 2005 Location: SK, Canada Posts: 488	Re: '78 GMC SC 454/T400 long to short bed build Looks cool. How much did you take out of the center of the frame? 14"? Do you have any pictures of the inside of the weld? I'm thinking of trying the same thing and wondering about options for reinforcing it. Edit: What I mean is, do you have any pictures of the inside of the frame where it was welded? Any more of the measuring/cutting process would be great too. __________________ Evan B.

01-03-2021, 11:53 PM	#7
Willowrun Senior Member Join Date: Mar 2013 Location: Ann Arbor, MI Posts: 1,029	Re: '78 GMC SC 454/T400 long to short bed build Interested in watching your progress.

01-09-2021, 06:01 PM	#9
superchevy Got big-block? Join Date: Jul 2000 Location: Austin, Texas Posts: 2,453	Re: '78 GMC SC 454/T400 long to short bed build Hey SCOTI, not sure yet as haven't installed it yet. I've got to rebuild the front suspension and install some new front springs with coil spring spacers...I need to see what the front end height is before I do the rear....limited options on the front for 2wd __________________ '68 CST SWB factory 396/T400 buddy buckets, a/c, ps, pb '72 Corvette convertible 454/4spd/ac, ps, pb '73 GMC Sierra Grande short wide 454/T400 ps, pb, ac '77 K5 Blazer black on red, 350/T350/NP205 ps, pb, ac all original '78 GMC Sierra Classic short wide 454/T400 ps, pb, ac '72 GMC Sprint SP454. 1 of 38 built. '73 GMC Sprint SP454. 1 of 71 built. '75 GMC Sprint SP454. 1 of 25 built. SOLD! '72 GMC K25 4x4 468/4L80e/NP205 build thread http://67-72chevytrucks.com/vboard/s...23#post4324423 SOLD!'55 Chevy gasser 496/4spd build thread http://67-72chevytrucks.com/vboard/s...96#post4324396

01-17-2021, 09:07 PM	#11
superchevy Got big-block? Join Date: Jul 2000 Location: Austin, Texas Posts: 2,453	Re: '78 GMC SC 454/T400 long to short bed build Got a little time to work on her today....what do you do when the shoes are up in the drums and the adjuster hole plugs are rusted in? You get the angle grinder out and some access to the shoes/springs/retainers.... Attached Images __________________ '68 CST SWB factory 396/T400 buddy buckets, a/c, ps, pb '72 Corvette convertible 454/4spd/ac, ps, pb '73 GMC Sierra Grande short wide 454/T400 ps, pb, ac '77 K5 Blazer black on red, 350/T350/NP205 ps, pb, ac all original '78 GMC Sierra Classic short wide 454/T400 ps, pb, ac '72 GMC Sprint SP454. 1 of 38 built. '73 GMC Sprint SP454. 1 of 71 built. '75 GMC Sprint SP454. 1 of 25 built. SOLD! '72 GMC K25 4x4 468/4L80e/NP205 build thread http://67-72chevytrucks.com/vboard/s...23#post4324423 SOLD!'55 Chevy gasser 496/4spd build thread http://67-72chevytrucks.com/vboard/s...96#post4324396

01-17-2021, 09:10 PM	#12
superchevy Got big-block? Join Date: Jul 2000 Location: Austin, Texas Posts: 2,453	Re: '78 GMC SC 454/T400 long to short bed build after getting the drums off, I could get the axles so I could replace the bearings and seals...simple right? mr. cross shaft pin said not so fast....ugh Attached Images __________________ '68 CST SWB factory 396/T400 buddy buckets, a/c, ps, pb '72 Corvette convertible 454/4spd/ac, ps, pb '73 GMC Sierra Grande short wide 454/T400 ps, pb, ac '77 K5 Blazer black on red, 350/T350/NP205 ps, pb, ac all original '78 GMC Sierra Classic short wide 454/T400 ps, pb, ac '72 GMC Sprint SP454. 1 of 38 built. '73 GMC Sprint SP454. 1 of 71 built. '75 GMC Sprint SP454. 1 of 25 built. SOLD! '72 GMC K25 4x4 468/4L80e/NP205 build thread http://67-72chevytrucks.com/vboard/s...23#post4324423 SOLD!'55 Chevy gasser 496/4spd build thread http://67-72chevytrucks.com/vboard/s...96#post4324396

01-17-2021, 09:13 PM	#13
superchevy Got big-block? Join Date: Jul 2000 Location: Austin, Texas Posts: 2,453	Re: '78 GMC SC 454/T400 long to short bed build finally got the new bearings and seals installed....now to get some new brake hardware and finish the rear... Attached Images __________________ '68 CST SWB factory 396/T400 buddy buckets, a/c, ps, pb '72 Corvette convertible 454/4spd/ac, ps, pb '73 GMC Sierra Grande short wide 454/T400 ps, pb, ac '77 K5 Blazer black on red, 350/T350/NP205 ps, pb, ac all original '78 GMC Sierra Classic short wide 454/T400 ps, pb, ac '72 GMC Sprint SP454. 1 of 38 built. '73 GMC Sprint SP454. 1 of 71 built. '75 GMC Sprint SP454. 1 of 25 built. SOLD! '72 GMC K25 4x4 468/4L80e/NP205 build thread http://67-72chevytrucks.com/vboard/s...23#post4324423 SOLD!'55 Chevy gasser 496/4spd build thread http://67-72chevytrucks.com/vboard/s...96#post4324396

01-24-2021, 06:20 PM	#14
superchevy Got big-block? Join Date: Jul 2000 Location: Austin, Texas Posts: 2,453	Re: '78 GMC SC 454/T400 long to short bed build with the new axle bearings and seals in, and a new diff lock bolt installed, I was able to get the new diff cover on and filled this weekend....also got the new shoes and brake hardware installed....getting closer Attached Images __________________ '68 CST SWB factory 396/T400 buddy buckets, a/c, ps, pb '72 Corvette convertible 454/4spd/ac, ps, pb '73 GMC Sierra Grande short wide 454/T400 ps, pb, ac '77 K5 Blazer black on red, 350/T350/NP205 ps, pb, ac all original '78 GMC Sierra Classic short wide 454/T400 ps, pb, ac '72 GMC Sprint SP454. 1 of 38 built. '73 GMC Sprint SP454. 1 of 71 built. '75 GMC Sprint SP454. 1 of 25 built. SOLD! '72 GMC K25 4x4 468/4L80e/NP205 build thread http://67-72chevytrucks.com/vboard/s...23#post4324423 SOLD!'55 Chevy gasser 496/4spd build thread http://67-72chevytrucks.com/vboard/s...96#post4324396

02-24-2021, 09:28 AM	#15
superchevy Got big-block? Join Date: Jul 2000 Location: Austin, Texas Posts: 2,453	Re: '78 GMC SC 454/T400 long to short bed build Got the rear brake lines run, rear leaf springs and u bolts back together, new shocks and hardware Attached Images __________________ '68 CST SWB factory 396/T400 buddy buckets, a/c, ps, pb '72 Corvette convertible 454/4spd/ac, ps, pb '73 GMC Sierra Grande short wide 454/T400 ps, pb, ac '77 K5 Blazer black on red, 350/T350/NP205 ps, pb, ac all original '78 GMC Sierra Classic short wide 454/T400 ps, pb, ac '72 GMC Sprint SP454. 1 of 38 built. '73 GMC Sprint SP454. 1 of 71 built. '75 GMC Sprint SP454. 1 of 25 built. SOLD! '72 GMC K25 4x4 468/4L80e/NP205 build thread http://67-72chevytrucks.com/vboard/s...23#post4324423 SOLD!'55 Chevy gasser 496/4spd build thread http://67-72chevytrucks.com/vboard/s...96#post4324396

02-24-2021, 09:30 AM	#16
superchevy Got big-block? Join Date: Jul 2000 Location: Austin, Texas Posts: 2,453	Re: '78 GMC SC 454/T400 long to short bed build the rear of the chassis is now complete and detailed...time to move to the front Attached Images __________________ '68 CST SWB factory 396/T400 buddy buckets, a/c, ps, pb '72 Corvette convertible 454/4spd/ac, ps, pb '73 GMC Sierra Grande short wide 454/T400 ps, pb, ac '77 K5 Blazer black on red, 350/T350/NP205 ps, pb, ac all original '78 GMC Sierra Classic short wide 454/T400 ps, pb, ac '72 GMC Sprint SP454. 1 of 38 built. '73 GMC Sprint SP454. 1 of 71 built. '75 GMC Sprint SP454. 1 of 25 built. SOLD! '72 GMC K25 4x4 468/4L80e/NP205 build thread http://67-72chevytrucks.com/vboard/s...23#post4324423 SOLD!'55 Chevy gasser 496/4spd build thread http://67-72chevytrucks.com/vboard/s...96#post4324396

02-24-2021, 09:32 AM	#17
superchevy Got big-block? Join Date: Jul 2000 Location: Austin, Texas Posts: 2,453	Re: '78 GMC SC 454/T400 long to short bed build Finally got nearly all of the new suspension and steering parts in Attached Images __________________ '68 CST SWB factory 396/T400 buddy buckets, a/c, ps, pb '72 Corvette convertible 454/4spd/ac, ps, pb '73 GMC Sierra Grande short wide 454/T400 ps, pb, ac '77 K5 Blazer black on red, 350/T350/NP205 ps, pb, ac all original '78 GMC Sierra Classic short wide 454/T400 ps, pb, ac '72 GMC Sprint SP454. 1 of 38 built. '73 GMC Sprint SP454. 1 of 71 built. '75 GMC Sprint SP454. 1 of 25 built. SOLD! '72 GMC K25 4x4 468/4L80e/NP205 build thread http://67-72chevytrucks.com/vboard/s...23#post4324423 SOLD!'55 Chevy gasser 496/4spd build thread http://67-72chevytrucks.com/vboard/s...96#post4324396



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02-24-2021, 09:34 AM	#18
superchevy Got big-block? Join Date: Jul 2000 Location: Austin, Texas Posts: 2,453	Re: '78 GMC SC 454/T400 long to short bed build time to get the front clip disassembled...got a start on it last night Attached Images __________________ '68 CST SWB factory 396/T400 buddy buckets, a/c, ps, pb '72 Corvette convertible 454/4spd/ac, ps, pb '73 GMC Sierra Grande short wide 454/T400 ps, pb, ac '77 K5 Blazer black on red, 350/T350/NP205 ps, pb, ac all original '78 GMC Sierra Classic short wide 454/T400 ps, pb, ac '72 GMC Sprint SP454. 1 of 38 built. '73 GMC Sprint SP454. 1 of 71 built. '75 GMC Sprint SP454. 1 of 25 built. SOLD! '72 GMC K25 4x4 468/4L80e/NP205 build thread http://67-72chevytrucks.com/vboard/s...23#post4324423 SOLD!'55 Chevy gasser 496/4spd build thread http://67-72chevytrucks.com/vboard/s...96#post4324396

02-24-2021, 04:07 PM	#20
superchevy Got big-block? Join Date: Jul 2000 Location: Austin, Texas Posts: 2,453	Re: '78 GMC SC 454/T400 long to short bed build Thanks! I got lucky on that bolt, lol. I was able to use a pick and rotate it out. Should've bought a lottery ticket that day! __________________ '68 CST SWB factory 396/T400 buddy buckets, a/c, ps, pb '72 Corvette convertible 454/4spd/ac, ps, pb '73 GMC Sierra Grande short wide 454/T400 ps, pb, ac '77 K5 Blazer black on red, 350/T350/NP205 ps, pb, ac all original '78 GMC Sierra Classic short wide 454/T400 ps, pb, ac '72 GMC Sprint SP454. 1 of 38 built. '73 GMC Sprint SP454. 1 of 71 built. '75 GMC Sprint SP454. 1 of 25 built. SOLD! '72 GMC K25 4x4 468/4L80e/NP205 build thread http://67-72chevytrucks.com/vboard/s...23#post4324423 SOLD!'55 Chevy gasser 496/4spd build thread http://67-72chevytrucks.com/vboard/s...96#post4324396

02-28-2021, 06:16 PM	#21
superchevy Got big-block? Join Date: Jul 2000 Location: Austin, Texas Posts: 2,453	Re: '78 GMC SC 454/T400 long to short bed build got the front clip fully disassembled and the 454/T400 out to rebuild Attached Images __________________ '68 CST SWB factory 396/T400 buddy buckets, a/c, ps, pb '72 Corvette convertible 454/4spd/ac, ps, pb '73 GMC Sierra Grande short wide 454/T400 ps, pb, ac '77 K5 Blazer black on red, 350/T350/NP205 ps, pb, ac all original '78 GMC Sierra Classic short wide 454/T400 ps, pb, ac '72 GMC Sprint SP454. 1 of 38 built. '73 GMC Sprint SP454. 1 of 71 built. '75 GMC Sprint SP454. 1 of 25 built. SOLD! '72 GMC K25 4x4 468/4L80e/NP205 build thread http://67-72chevytrucks.com/vboard/s...23#post4324423 SOLD!'55 Chevy gasser 496/4spd build thread http://67-72chevytrucks.com/vboard/s...96#post4324396

02-28-2021, 06:20 PM	#22
superchevy Got big-block? Join Date: Jul 2000 Location: Austin, Texas Posts: 2,453	Re: '78 GMC SC 454/T400 long to short bed build today started stripping the interior... Attached Images __________________ '68 CST SWB factory 396/T400 buddy buckets, a/c, ps, pb '72 Corvette convertible 454/4spd/ac, ps, pb '73 GMC Sierra Grande short wide 454/T400 ps, pb, ac '77 K5 Blazer black on red, 350/T350/NP205 ps, pb, ac all original '78 GMC Sierra Classic short wide 454/T400 ps, pb, ac '72 GMC Sprint SP454. 1 of 38 built. '73 GMC Sprint SP454. 1 of 71 built. '75 GMC Sprint SP454. 1 of 25 built. SOLD! '72 GMC K25 4x4 468/4L80e/NP205 build thread http://67-72chevytrucks.com/vboard/s...23#post4324423 SOLD!'55 Chevy gasser 496/4spd build thread http://67-72chevytrucks.com/vboard/s...96#post4324396

03-02-2021, 09:35 AM	#23
superchevy Got big-block? Join Date: Jul 2000 Location: Austin, Texas Posts: 2,453	Re: '78 GMC SC 454/T400 long to short bed build I got the passenger door disassembled yesterday evening. I think I'm going to reuse the lower carpet/panel trims as both sides are near mint. Attached Images __________________ '68 CST SWB factory 396/T400 buddy buckets, a/c, ps, pb '72 Corvette convertible 454/4spd/ac, ps, pb '73 GMC Sierra Grande short wide 454/T400 ps, pb, ac '77 K5 Blazer black on red, 350/T350/NP205 ps, pb, ac all original '78 GMC Sierra Classic short wide 454/T400 ps, pb, ac '72 GMC Sprint SP454. 1 of 38 built. '73 GMC Sprint SP454. 1 of 71 built. '75 GMC Sprint SP454. 1 of 25 built. SOLD! '72 GMC K25 4x4 468/4L80e/NP205 build thread http://67-72chevytrucks.com/vboard/s...23#post4324423 SOLD!'55 Chevy gasser 496/4spd build thread http://67-72chevytrucks.com/vboard/s...96#post4324396

03-02-2021, 09:36 AM	#24
superchevy Got big-block? Join Date: Jul 2000 Location: Austin, Texas Posts: 2,453	Re: '78 GMC SC 454/T400 long to short bed build door panel carpet Attached Images __________________ '68 CST SWB factory 396/T400 buddy buckets, a/c, ps, pb '72 Corvette convertible 454/4spd/ac, ps, pb '73 GMC Sierra Grande short wide 454/T400 ps, pb, ac '77 K5 Blazer black on red, 350/T350/NP205 ps, pb, ac all original '78 GMC Sierra Classic short wide 454/T400 ps, pb, ac '72 GMC Sprint SP454. 1 of 38 built. '73 GMC Sprint SP454. 1 of 71 built. '75 GMC Sprint SP454. 1 of 25 built. SOLD! '72 GMC K25 4x4 468/4L80e/NP205 build thread http://67-72chevytrucks.com/vboard/s...23#post4324423 SOLD!'55 Chevy gasser 496/4spd build thread http://67-72chevytrucks.com/vboard/s...96#post4324396

03-02-2021, 10:15 AM	#25
SCOTI Registered User Join Date: Apr 2001 Location: DALLAS,TX Posts: 22,066	Re: '78 GMC SC 454/T400 long to short bed build This is coming completely apart __________________ 67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... *Cubic inches is like Indiana Jones with a cheap pistol.*

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