My 440 has TRW forged "6-pack" pistons. They are .020 in te hole. W/ a 74cc head and the FAT fel-pros I should be at about 10.82:1. My 67 Coronet had a 70 440 w/ stock Speed Pro relacements they were way down in the hole (I don't remeber how far) but we figured w/ the steel shim head gaskets and stock 906's it was about 9:1