frame swap for a 4x4 - Page 3 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Momboy007 · 10-30-2008, 01:10 AM

Hello Grendel,
When you say there is a 1 " differnece in the middle of the frame between a 2x4 truck and a 4x4 truck, will it matter if I want to convert my truck from 2x4 to 4x4?
Thanks,
Rick

*FormerMember* · 10-30-2008, 07:21 AM

...

**Dieselwrencher** · 10-30-2008, 04:20 PM

Quote:

Originally Posted by padresag

I did measure the depth of my frames and the 2 x 4 was 6" deep(about 10" behind the frt cab mount) and the 4 x 4 was 8" so there is a 2" difference between the frames
ron

And both of these are 1/2 tons, right? Just curious, thanks Ryan.

padresag · 10-30-2008, 04:38 PM

Quote:

Originally Posted by Dieselwrencher

And both of these are 1/2 tons, right? Just curious, thanks Ryan.

yes
ron

prg machine · 10-30-2008, 04:40 PM

so are the 3/4 4x4 frames taller\?????

padresag · 10-30-2008, 04:49 PM

Quote:

Originally Posted by prg machine

so are the 3/4 4x4 frames taller?????

I guess that no one could be bothered to measure it
ron

Jtrux · 10-30-2008, 05:32 PM

I've got it in my head now that i'm gonna convert my 2wd chevy frame with rear leaves to 4x4. I need to call Kurt at DIY and see if his FGB52 spring hangers will work. Nothing too radical but cool none the less.

*FormerMember* · 10-30-2008, 05:41 PM

...

prg machine · 10-30-2008, 09:59 PM

Quote:

Originally Posted by prg machine

so are the 3/4 4x4 frames taller?????

I guess the question is: If side by side 3/4 ton or 1/2 ton 4x4/..........................is one taller in the channel height than the other or both the same height???

og350 · 10-30-2008, 11:14 PM

where would you like a measument from? let me know i have a 71 3/4 4x4

padresag · 10-30-2008, 11:17 PM

Quote:

Originally Posted by og350

where would you like a measument from? let me know i have a 71 3/4 4x4

I took my measurement about 10" behind(towards the rear) of the frt cab mount
ron

og350 · 10-30-2008, 11:41 PM

ok i will try to get it measured tomorrow after work.

prg machine · 10-31-2008, 02:33 AM

okay, I'll measure my 69 K-20.

The reason I ask is if there is /was a diff between the 3/4 or the 1/2 K trucks. and a diff between those to the 2wd same trucks

Jtrux · 10-31-2008, 04:38 PM

Quote:

Originally Posted by grendel

They will work. I did it.

With the 52" springs, you don't have to mess with the e-brake bump out. Tell him I sent you.

Yeah i'll tell him. Hopefully get started real soon. Need to get the truck out of storage first.

*FormerMember* · 11-02-2008, 11:13 AM

...

og350 · 11-03-2008, 07:47 PM

ok so sorry it took me a few days but the frame and my 71 3/4 4x4 is 6" from top to bottom of the rail all the way under the cab. hope that helps

prg machine · 11-03-2008, 10:55 PM

I will be off this Friday and can go measure then it is dark before and after work and raining right now.......................seems like the 69 K-20 I have is also 6 inches if i was to guess.

**Dieselwrencher** · 11-05-2008, 07:56 PM

Quote:

Originally Posted by grendel

Some great info here on the frame height differences. I thought there was an inch difference between the 2x4 and 4x4 versions, but sounds like there's two inches?

On my Longhorn frame, which I think would be the same as a camper special leaf spring rear susp truck, there is only 3/8 difference in frame channel heighth according to these measurements. As Padresag posted his 4x4 3/4 ton frame is 8" high at 10" behind the front cab mount. My Longhorn frame is 7 5/8" From top of flange to bottom of flange 10" behind the front cab mount. So maybe there is an inch difference on the coil spring rear 3/4 ton trucks?

10-30-2008, 01:10 AM	#51
Momboy007 Registered User Join Date: Mar 2008 Location: Southern California Posts: 82	Re: frame swap for a 4x4 Hello Grendel, When you say there is a 1 " differnece in the middle of the frame between a 2x4 truck and a 4x4 truck, will it matter if I want to convert my truck from 2x4 to 4x4? Thanks, Rick

10-30-2008, 07:21 AM	#52
FormerMember Account Suspended Join Date: Feb 2004 Posts: 3,051	Re: frame swap for a 4x4 ... Last edited by FormerMember; 04-02-2009 at 03:48 PM.

10-30-2008, 04:40 PM	#55
prg machine Registered User Join Date: Jun 2007 Location: oregon Posts: 1,069	Re: frame swap for a 4x4 so are the 3/4 4x4 frames taller\????? __________________ 69 K-20 cloned to a 67 with front clip and some other stuff. 383 .040 over Crane roller cam lifters and rockers ,1.6 intake ratio, Open chamber heads, 9.5-1 compression ratio, 2.02 intake valves , Edelbrock performer Air Gap manifold Carter AFB performer 750cfm, MSD ignition, SM465 NP205 4.10 gears:

10-30-2008, 05:32 PM	#57
Jtrux I'm a poor spectator Join Date: Aug 2006 Location: San Antonio, Tx Posts: 2,287	Re: frame swap for a 4x4 I've got it in my head now that i'm gonna convert my 2wd chevy frame with rear leaves to 4x4. I need to call Kurt at DIY and see if his FGB52 spring hangers will work. Nothing too radical but cool none the less. __________________ 2006 Jeep Unlimited IMPACT ORANGE 1993 Chevy 2500 4x4 ExCab LWB 454/NV4500 Tow rig 1977 Ford F100 2x4 LWB 1st truck I owned, still have it!!! 1979 Ford F150 4x4 SWB Built Ford Tough!!! 1971 Chevy Blazer 350 / SM465 / NP205 UNDER CONSTRUCTION Soon to have a LQ4 6.0!!!

10-30-2008, 05:41 PM	#58
FormerMember Account Suspended Join Date: Feb 2004 Posts: 3,051	Re: frame swap for a 4x4 ... Last edited by FormerMember; 04-02-2009 at 03:48 PM.

10-30-2008, 11:14 PM	#60
og350 Registered User Join Date: Apr 2008 Location: river falls, Wisconsin Posts: 236	Re: frame swap for a 4x4 where would you like a measument from? let me know i have a 71 3/4 4x4

10-30-2008, 11:41 PM	#62
og350 Registered User Join Date: Apr 2008 Location: river falls, Wisconsin Posts: 236	Re: frame swap for a 4x4 ok i will try to get it measured tomorrow after work.

10-31-2008, 02:33 AM	#63
prg machine Registered User Join Date: Jun 2007 Location: oregon Posts: 1,069	Re: frame swap for a 4x4 okay, I'll measure my 69 K-20. The reason I ask is if there is /was a diff between the 3/4 or the 1/2 K trucks. and a diff between those to the 2wd same trucks __________________ 69 K-20 cloned to a 67 with front clip and some other stuff. 383 .040 over Crane roller cam lifters and rockers ,1.6 intake ratio, Open chamber heads, 9.5-1 compression ratio, 2.02 intake valves , Edelbrock performer Air Gap manifold Carter AFB performer 750cfm, MSD ignition, SM465 NP205 4.10 gears:

11-02-2008, 11:13 AM	#65
FormerMember Account Suspended Join Date: Feb 2004 Posts: 3,051	Re: frame swap for a 4x4 ... Last edited by FormerMember; 04-02-2009 at 03:49 PM.

11-03-2008, 07:47 PM	#66
og350 Registered User Join Date: Apr 2008 Location: river falls, Wisconsin Posts: 236	Re: frame swap for a 4x4 ok so sorry it took me a few days but the frame and my 71 3/4 4x4 is 6" from top to bottom of the rail all the way under the cab. hope that helps

11-03-2008, 10:55 PM	#67
prg machine Registered User Join Date: Jun 2007 Location: oregon Posts: 1,069	Re: frame swap for a 4x4 I will be off this Friday and can go measure then it is dark before and after work and raining right now.......................seems like the 69 K-20 I have is also 6 inches if i was to guess. __________________ 69 K-20 cloned to a 67 with front clip and some other stuff. 383 .040 over Crane roller cam lifters and rockers ,1.6 intake ratio, Open chamber heads, 9.5-1 compression ratio, 2.02 intake valves , Edelbrock performer Air Gap manifold Carter AFB performer 750cfm, MSD ignition, SM465 NP205 4.10 gears:

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