440 build, need advice with the little details

452 heads heads do not use offset rockers, no matter what cam. and with 452 heads (maybe unless they are super well ported) 1.5 rockers will be great with that big cam. I like comp cams pro magnums. compression ratio will be about 10.4:1 with .038" head gaskets. those pistons have valve reliefs-maybe enough for that cam-maybe not-you need to check-another reason to stick with 1.5 rockers