I still have the track log from the original owner of my old 70 RAM IV JUDGE M21 trans and 433 posi! In one years time He went from 14.02 [3 days old] to an 11.98@ 118 mph! With installed headers,recurved distributor,ported heads and 7 inch goodyear slicks [d-5 compound] but still running the original intake and carb!!!
Launched it at 6000 and flat shifted it at 6400!!!
I have the slips from capital raceway in maryland. To answer your questions about them running better now is back then you launced off a concrete pad!! unlike today.
