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cypressbog · 10-03-2018, 05:16 PM

I bought a 71 4x4 half-ton truck 17 years ago that had a BB prior to my purchase. The firewall was pounded on to make room for the distributor and the engine cradle was seriously cut to make way for the oil pan. It was upgraded to 8 lug axles from a mid-70's Chevy 3/4 ton truck.

If you're installing in a 1/2 ton with factory running gear, I'd worry about if the axles, drive shafts, and U-joints are strong enough.

10-03-2018, 05:16 PM	#4
cypressbog Go Pack Go! Join Date: Nov 2005 Location: Green Bay Posts: 2,669	Re: 72 4x4 BB swap? I bought a 71 4x4 half-ton truck 17 years ago that had a BB prior to my purchase. The firewall was pounded on to make room for the distributor and the engine cradle was seriously cut to make way for the oil pan. It was upgraded to 8 lug axles from a mid-70's Chevy 3/4 ton truck. If you're installing in a 1/2 ton with factory running gear, I'd worry about if the axles, drive shafts, and U-joints are strong enough.