I have a 354 motor that is a poly head with a set of 1956 354 Hemi head cores . You can build ether one the blocks are the same . It was a running motor (poly) in a hot rod that smoked so i took it apart and check it all out . It will need a .030 overbore and pistons , all the parts are in nice shape . I can't ship it but can help out with a relay if you can find someone in Central Florida to pick it up . lmk