I don't think the 327 has enough crankcase clearance for the 350 crankshaft to turn properly. The large-journal 327 crank spins freely in a 350 block, but not the other way around. I raced 327's on the dirt track for several years, and we couldn't make a 350 out of one with a crank swap.
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!
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