Looking at B1 engines for my car right now. It's hard to argue when I'm finding 632 Chevy motors complete ready to run anywhere from $10 to $15 grand. And like it's been said, you really won't find many "Chevy" parts in those motors. Someone tell me the difference between a predator valve cover and a BBC valve cover. Go over to Koeffel's website and look at the B1TS pics. Tell me what difference there is from a BBC head besides the bolt pattern.