The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - 67-72 BigBlock 4x4s! Pos pics info here.

RustyParts · 03-02-2008, 07:05 PM

I put a 454 in my '72 Jimmy and had to do some work to the firewall on the drivers side for valve cover clearance. I cut out some of the firewall moved it towards the drivers side and rewelded it.

I also moved the engine, tranny/transfer case forward 1" for HEI clearance, didn't really have to move the engine, but the HEI was to close for my preference.

Also had to trim the frame rails for header clearance.

03-02-2008, 07:05 PM	#26
RustyParts Registered User Join Date: May 2006 Location: Wyman, Kentucky Posts: 403	Re: 67-72 BigBlock 4x4s! Pos pics info here. I put a 454 in my '72 Jimmy and had to do some work to the firewall on the drivers side for valve cover clearance. I cut out some of the firewall moved it towards the drivers side and rewelded it. I also moved the engine, tranny/transfer case forward 1" for HEI clearance, didn't really have to move the engine, but the HEI was to close for my preference. Also had to trim the frame rails for header clearance. Attached Images __________________ 1972 GMC Jimmy, 4WD, 454 CI, 350 Turbo, 4" lift, 35" tires The math teacher said my son "Bubba" could be a mathmatical genius. cause he's got 13 fingers!