this is where my engine set up gets a little complicated. when i bought the cruiser it had a 2f block and an f head on it with flat-top pistons, we rebuilt the block and decided to switch to domed pistons at the advice of the machine shop. who forgot to magnaflux the head untill they had finished all the work on it. so now i've got a '78 2f block with domed pistons and need to find a new head soon. i'm under the impression that an F head will work, but will a 2F head be the way to go?