I run my 377" to 7200/7300 shifting at 6800. It's a 509 2 bolt block filled to the water pump holes with a good bottom end, 4340 Eagle, 350 mains with Bearing spacers, Eagle "H" beam rods with L19 bolts, and JE 13.5 pistons, and Track 1 heads. It runs 10.59 @ 125 and 6.52 in the 1/8 car weighs 3253lbs at Memphis. i have pulled the top end chip out and run it in a dragster 8.23 @ 158mph and 5.15 1/8, in fact we broke out with a 5.13 at the Super Chevy show at Memphis, all on Alcohol.
No issuses with over 100 passes.
Zip.