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. The difference is the Chevy will make more power. 
CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
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