So after much research and so far spot on advise I have decised that for the mean time to stay with the iron heads. Now to choose the best heads for my stock 455 block. First question can heads intended for 400's be used on a 455 block? If so I have found two very clean heads already magnafluxed and ready to go (7k3)2.11/1.77 96cc[$450] and (6x-4)2.11/1.66 93.74cc[$400]. Are these good prices and what should I expext as far as preformance over my 114cc 4x-1h heads.
the hardest part about using the 7K3 heads, is they don't have the last holes for using headers if that is what you want. they don't even have the metal there to drill. they do make an L bracket you can bolt on but the 6X4 would work easier.
I have 6x8 but the 6x4s are better.. Use a nice street cam like the Crower 60919 and you'll be in good shape with 89-91 gas. I have that cam in my 462 and love it!.. Your cam is going to be a big factor in compression too!