The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - 1972 Cheyenne Stepside

**70cst** · 03-08-2004, 11:31 AM

396 to a 402BB

I'm not sure the reasons for the change but I believe in 1970 they bored out the 396 just enough to bump it up to a 402...Ok guys....Help me out...Why did they change from a 396BB to a 402BB? Also I believe the BB's were only available on the 2wd trucks in the 67-72 years.
I claim to know just enough about these trucks to be dangerous.

03-08-2004, 11:31 AM	#37
70cst Senior Member Join Date: Feb 2001 Location: New Madison, Ohio Posts: 21,377	396 to a 402BB I'm not sure the reasons for the change but I believe in 1970 they bored out the 396 just enough to bump it up to a 402...Ok guys....Help me out...Why did they change from a 396BB to a 402BB? Also I believe the BB's were only available on the 2wd trucks in the 67-72 years. I claim to know just enough about these trucks to be dangerous.