I've built a few "fake" Z-28 302 engines by using an early-production 327 block with the small main bearing bores and a 283 crankshaft. The numbers didn't check out, but the performance was the same. The "098" Duntov cam (last 3 digits of the part number) was the hot one. Some guys called it the "30-30" cam because that was the valve adjustment specification, .030" intake and exhaust. I've run a lot of laps on a 1/4 mile dirt track with that setup- - - -come off the turn at 3500 RPM and wind it to 8K by the end of the straightaway. It sounds like a bumblebee on steroids!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!