hyper piston 100 dome 4.000 crank 6.135 rod stock 454 8.5.1 cr with 118 so yes the CH is some what right but if you knew that you should know they will work ? they should be more then 1.625 thats 040 to get to O deck most piston are 1.645CH for 454 and thats a deck of 9.780 so thats. 020 off the deck to get O