Pro Stock. The good old days

K.. i had never heard of moving a lifter valley.. that is just insane to me..

If you ever tried to run a small block MoPar to the RPM they were running you’d know why they did it.

IMO, if you have all your **** together you can reliably run 8500. After that it’s a crap shoot. Past 9k is just death on the lifters and everything else.