1972 3/4 ton 4x4 SB To BB Conversion Pictures - The 1947 - Present Chevrolet & GMC Truck Message Board Network

cwilkie · 07-09-2011, 11:01 AM

Does anyone have any advice or pictures for converting a 1972 3/4 ton 4x4 from a 350sb to a 402bb with HEI? What kind of (year) bick block engine mounts do I need? How far does the engine need to be from the firewall? Can I use the same radiator that came with the sb? Is there anything else I am missing?

mrein3 · 07-10-2011, 09:59 PM

What was the guy's board name who did this? He put a big block in a Blazer. His buddy had/has a 3/4 ton he converted to a 1-ton with 73-87 parts.

Some guys with 4x4s end up having to "clearance" the firewall. Other guys got their big blocks in with a mild body lift. Other guys claim they fit with no modifications.

There are threads out there. Maybe you need to try a few different searches.

cwilkie · 07-10-2011, 10:10 PM

I am hoping all it takes is to move the engine cradle ahead two inches and use the 1972 big block 2wd towers. If not I have a set of 67-71 big block towers I could also use. I wish I could find some pictures of the conversion as well.

07-09-2011, 11:01 AM	#1
cwilkie Chance Join Date: Sep 2001 Location: Belcourt ,ND, USA Posts: 750	1972 3/4 ton 4x4 SB To BB Conversion Pictures Does anyone have any advice or pictures for converting a 1972 3/4 ton 4x4 from a 350sb to a 402bb with HEI? What kind of (year) bick block engine mounts do I need? How far does the engine need to be from the firewall? Can I use the same radiator that came with the sb? Is there anything else I am missing? __________________ 1968 Chevrolet Stepside BB 396 w/TH400 1972 Chevrolet 3/4 Ton 4x4 BB 496 w/TH400

07-10-2011, 09:59 PM	#2
mrein3 Registered User Join Date: Feb 2000 Location: Center City, MN, USA Posts: 3,254	Re: 1972 3/4 ton 4x4 SB To BB Conversion Pictures What was the guy's board name who did this? He put a big block in a Blazer. His buddy had/has a 3/4 ton he converted to a 1-ton with 73-87 parts. Some guys with 4x4s end up having to "clearance" the firewall. Other guys got their big blocks in with a mild body lift. Other guys claim they fit with no modifications. There are threads out there. Maybe you need to try a few different searches. __________________ '70 cab, '71 chassis, 383, TH350, NP205. '71 Malibu convertible '72 Malibu hard top Center City, MN

07-10-2011, 10:10 PM	#3
cwilkie Chance Join Date: Sep 2001 Location: Belcourt ,ND, USA Posts: 750	Re: 1972 3/4 ton 4x4 SB To BB Conversion Pictures I am hoping all it takes is to move the engine cradle ahead two inches and use the 1972 big block 2wd towers. If not I have a set of 67-71 big block towers I could also use. I wish I could find some pictures of the conversion as well. __________________ 1968 Chevrolet Stepside BB 396 w/TH400 1972 Chevrolet 3/4 Ton 4x4 BB 496 w/TH400



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