[Musclecarkid]

I checked with someone i know who has taken alot of virgin motors apart and here is what i was told,it kind of falls in to what i had stated.Hope it helps ! 1967 435hps taken apart for the first time have had 7115 cranks with very few exceptions, 2 bolt main 427 motors usually had 6223 cranks,only corvette w 2 bolt mains ever used a 7115 . 427 COPO 427s mostly had 7115. Impala and passenger 427 hi perf used 6223 exclusively,this is from a pool of around 150 motors that were taken apart seemingly for the first time. As far as L88 and ZL1 ,only 3 L88 and 1 Zl1 were taken apart like this and all had 7115, Still have yet to see a 6223 crank even in a new crate motor from the late 70s as has been claimed,although certainly a possibility 8 nos assemblys from the 70s have had exclusively #7115 cranks " There you go !