1972 C10 long bed beater with a 4.8 LSx swap - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Matt Cramer · 08-09-2013, 09:36 PM

Oops, accidentally put my build thread title here and my question in the build thread board.

So, I'm trying to fit a 4.8 into my '72 C10. Using the mounts that set the engine forward 3", what appear to be six cylinder engine stands, and the cross member redrilled to move the engine stands back about 3" to put the engine in the stock location.

The 4.8 truck manifolds don't fit too well:

They hit the engine stands (right now the motor is resting in the engine compartment, but the stands are pushed so far apart they don't reach down to the crossmember) and exit too close to the frame rails. So, I need some sort of manifolds or headers that give a lot of clearance between the first and second cylinders on each side. The Doug Thornley headers look like they'd work, but are on the pricey side. I've seen a few similar swaps where someone tried Trailblazer SS manifolds, and they didn't work. Fifth generation Camaro manifolds look like a possibility. But then I found these:

BBK LS3 / L99 shorty headers

Looks like it might work - and would be a bit easier to hammer a bit of extra clearance into if they didn't, compared to an iron manifold. Anybody tried these, or other fifth generation Camaro headers, in a '67-'72 C10? Especially with the mounts far back on the block like mine and six cylinder engine stands.

**truckdude239** · 08-09-2013, 11:08 PM

I used the trailblazer ss manifolds
Posted via Mobile Device

BR3W CITY · 08-10-2013, 03:32 AM

Same, and with the 6cylinder stands and the engine that far forward, they will be one of your only options. The Dough Thorley header also fits but its much more expensive, though very very nice.

Some have also gotten the tubular fbody manifolds to fit, sometimes with modification. The new Camaro manifolds have also been used in a few configurations.

Matt Cramer · 08-10-2013, 07:55 AM

Any pictures of how they fit? I've seen a couple pictures showing the TBSS manifolds hitting the six cylinder mounts, or coming so close you have to hack them up:

http://67-72chevytrucks.com/vboard/s...67&postcount=3

http://67-72chevytrucks.com/vboard/s...d.php?t=447751

Like the guy in that thread, the engine isn't very far forward - it's the mounts that are moved far backward. Mostly to clear the A/C compressor.

Wasted Income · 08-12-2013, 11:23 AM

Can't wait to see this truck running megasquirt

Leonard1 · 08-13-2013, 09:19 PM

I used the TBSS exhaust manifolds, and couldn't get them to clear the "humps" on the original perches. So I wound up using a set of 73+ perches.

**truckdude239** · 08-13-2013, 10:21 PM

Ill load me tomorrow but the tb ss manifold cleared perfect on my 71 with dirty dingo silder mounts with the oringal perches
Posted via Mobile Device

Matt Cramer · 08-22-2013, 06:09 PM

Quote:

Originally Posted by Wasted Income

Can't wait to see this truck running megasquirt

It looks as if my reputation has preceded me here.

It's going to be running MS3.

Wasted Income · 08-26-2013, 09:31 AM

Quote:

Originally Posted by Matt Cramer

It looks as if my reputation has preceded me here.

It's going to be running MS3.

Well anyone who has spent as much as much with DIYAutoTune as my brother and I have, knows the name Matt Cramer.

08-09-2013, 09:36 PM	#1
Matt Cramer Registered User Join Date: Apr 2012 Location: Covington, GA Posts: 386	1972 C10 long bed beater with a 4.8 LSx swap Oops, accidentally put my build thread title here and my question in the build thread board. So, I'm trying to fit a 4.8 into my '72 C10. Using the mounts that set the engine forward 3", what appear to be six cylinder engine stands, and the cross member redrilled to move the engine stands back about 3" to put the engine in the stock location. The 4.8 truck manifolds don't fit too well: They hit the engine stands (right now the motor is resting in the engine compartment, but the stands are pushed so far apart they don't reach down to the crossmember) and exit too close to the frame rails. So, I need some sort of manifolds or headers that give a lot of clearance between the first and second cylinders on each side. The Doug Thornley headers look like they'd work, but are on the pricey side. I've seen a few similar swaps where someone tried Trailblazer SS manifolds, and they didn't work. Fifth generation Camaro manifolds look like a possibility. But then I found these: BBK LS3 / L99 shorty headers Looks like it might work - and would be a bit easier to hammer a bit of extra clearance into if they didn't, compared to an iron manifold. Anybody tried these, or other fifth generation Camaro headers, in a '67-'72 C10? Especially with the mounts far back on the block like mine and six cylinder engine stands. __________________ Matt Cramer 1972 Chevy C10 - 4.8 swap, long bed, and maybe one dent free body panel somewhere - SOLD 4.8 LS build thread Last edited by Matt Cramer; 08-09-2013 at 09:50 PM.

08-09-2013, 11:08 PM	#2
truckdude239 Senior Member Join Date: Sep 2005 Location: Lewisville, Nc Posts: 10,237	Re: 1972 C10 long bed beater with a 4.8 LSx swap I used the trailblazer ss manifolds Posted via Mobile Device __________________ David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube

08-10-2013, 03:32 AM	#3
BR3W CITY meowMEOWmeowMEOW Join Date: Sep 2009 Location: MKE WI Posts: 7,128	Re: 1972 C10 long bed beater with a 4.8 LSx swap Same, and with the 6cylinder stands and the engine that far forward, they will be one of your only options. The Dough Thorley header also fits but its much more expensive, though very very nice. Some have also gotten the tubular fbody manifolds to fit, sometimes with modification. The new Camaro manifolds have also been used in a few configurations. __________________ *'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING* MY BUILD THE H8RDCPTR //\\ MY YOUTUBE CHANNEL REV J HD

08-10-2013, 07:55 AM	#4
Matt Cramer Registered User Join Date: Apr 2012 Location: Covington, GA Posts: 386	Re: 1972 C10 long bed beater with a 4.8 LSx swap Any pictures of how they fit? I've seen a couple pictures showing the TBSS manifolds hitting the six cylinder mounts, or coming so close you have to hack them up: http://67-72chevytrucks.com/vboard/s...67&postcount=3 http://67-72chevytrucks.com/vboard/s...d.php?t=447751 Like the guy in that thread, the engine isn't very far forward - it's the mounts that are moved far backward. Mostly to clear the A/C compressor. __________________ Matt Cramer 1972 Chevy C10 - 4.8 swap, long bed, and maybe one dent free body panel somewhere - SOLD 4.8 LS build thread Last edited by Matt Cramer; 08-10-2013 at 08:06 AM.

08-12-2013, 11:23 AM	#5
Wasted Income Boosted Member Join Date: May 2002 Location: Mackinaw, IL Posts: 2,200	Re: 1972 C10 long bed beater with a 4.8 LSx swap Can't wait to see this truck running megasquirt __________________ 1972 2wd K/5 Blazer Turbocharged 370 LSx - 941 rwhp / 1093 rwtq 1969 Chevy K-10 L33 5.3 / 4L80E / NP241 / 4" lift 1964 Buick Skylark Twin TURBO 383 LS pro-touring project 2014 VW Passat TDI - Daily Driver Turbo diesel 2015 Sierra Denali HD Duramax Turbo diesel 2023 Ford Explorer ST - Twin Turbskis 2023 Ford F150 RCSB - Whipple Supercharged 2017 Polaris RZR Turbo 2014 Nor-Tech Center Console - Twin Supercharged Outboards *TURBO ALL THE THINGS!!*

08-13-2013, 09:19 PM	#6
Leonard1 Registered User Join Date: Nov 2005 Location: Paducah, Ky Posts: 393	Re: 1972 C10 long bed beater with a 4.8 LSx swap I used the TBSS exhaust manifolds, and couldn't get them to clear the "humps" on the original perches. So I wound up using a set of 73+ perches.

08-13-2013, 10:21 PM	#7
truckdude239 Senior Member Join Date: Sep 2005 Location: Lewisville, Nc Posts: 10,237	Re: 1972 C10 long bed beater with a 4.8 LSx swap Ill load me tomorrow but the tb ss manifold cleared perfect on my 71 with dirty dingo silder mounts with the oringal perches Posted via Mobile Device __________________ David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube



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