57 4x4 drivetrain question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Wildstreak · 08-30-2010, 02:32 PM

I was wondering if I swapped cross members and drivetrain from a 71 4x4 into the 57 would I have any clearance problems in between the cab and drivetrain? Basically I have a 350/4spd/np205 and would like to put it into my 57, other than cross members, would I have to modify anything else?

OrrieG · 08-30-2010, 08:28 PM

axles will mount to the springs. See my build thread for other issues like crossmembers, etc. I kept the crossmember at the front spring rear shackles for frame stiffness but I have seen guys take they out. With the 4 speed it might not be an issue to leave it. If you pull the stock one I would replace it with some sort of cross member. Lots of room between the cab and drive train. Mine is 74 350/th350/np203

raycow · 08-30-2010, 10:00 PM

IMO it would be less work to keep the 57 bellhousing crossmember. The 71 bellhousing will mount on it like stock.

Ray

Wildstreak · 08-30-2010, 10:46 PM

Quote:

Originally Posted by raycow

IMO it would be less work to keep the 57 bellhousing crossmember. The 71 bellhousing will mount on it like stock.

Ray

the sm465 from the 71 doesnt have a bellhouse mount like the 57 tho, the mount is in between the tranny and transfer-case.

Wildstreak · 08-30-2010, 10:57 PM

Quote:

Originally Posted by OrrieG

axles will mount to the springs. See my build thread for other issues like crossmembers, etc. I kept the crossmember at the front spring rear shackles for frame stiffness but I have seen guys take they out. With the 4 speed it might not be an issue to leave it. If you pull the stock one I would replace it with some sort of cross member. Lots of room between the cab and drive train. Mine is 74 350/th350/np203

read through your thread, it gave me a good idea of what I want to do. I have a universal tubular engine mount Im going to use because I really dont like the look of the stock mounting.

Do you have any pics of your brake booster and how it is set up? I got this truck from my dad, at one time he had a guy start rebuilding it but he was just dicking around so we took it back. The trucks pieces are scattered and I dont really know what Im looking for lol.

08-30-2010, 02:32 PM	#1
Wildstreak "something witty here" Join Date: Apr 2009 Location: Salmo, B.C, Canada Posts: 966	57 4x4 drivetrain question I was wondering if I swapped cross members and drivetrain from a 71 4x4 into the 57 would I have any clearance problems in between the cab and drivetrain? Basically I have a 350/4spd/np205 and would like to put it into my 57, other than cross members, would I have to modify anything else? __________________ 57 chevy 4x4 70 swb fleetside 4x4 68 burb 2wd: 71 burb 2wd: 350 4spd 71 lwb fleetside 4x4: 350/sm465/205/3.07 eaton posi rear 72 lwb fleetside Cheyenne 454/th400 1991 GMC V3500 CC 4x4

08-30-2010, 08:28 PM	#2
OrrieG Registered User Join Date: Jun 2006 Location: Idaho Posts: 8,800	Re: 57 4x4 drivetrain question axles will mount to the springs. See my build thread for other issues like crossmembers, etc. I kept the crossmember at the front spring rear shackles for frame stiffness but I have seen guys take they out. With the 4 speed it might not be an issue to leave it. If you pull the stock one I would replace it with some sort of cross member. Lots of room between the cab and drive train. Mine is 74 350/th350/np203 __________________ 1959 Chevy Short Fleetside w/ 74 4WD drive train (current project) OrrieG Build Thread 1964 Chevelle Malibu w/ 355-350TH (daily driver) Helpful AD and TF Manual Site Old Car Manual Project Last edited by OrrieG; 08-30-2010 at 08:29 PM.

08-30-2010, 10:00 PM	#3
raycow Registered User Join Date: Mar 2003 Location: San Francisco, CA USA Posts: 2,454	Re: 57 4x4 drivetrain question IMO it would be less work to keep the 57 bellhousing crossmember. The 71 bellhousing will mount on it like stock. Ray



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