Re: L72 block
321 casting used June 67 thru mid jan 68 Earliest ive seen is F77[June 7 1967] and the latest ive seen is A188. Jan 18 1968. It is used on any 427 vehicle low or high horsepower,not just corvette. I dont think its feasable to have a 942 block in a 68 427 car,in fact its very unlikely as the 351 run lasted almost a year before the 321[latest date known is around June 66 on the 942. Its probably pushing[although possible] it to think a 351 block was in a 68 yenko too.
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