NEED TO TALK

Nice car- split the difference- go 318. It would had been a factory engine and still has power AND gas economy.

Very nice car!
Good luck and even though I know I will cause some serious flack with this statement... a Slant 6 no matter how much you do to it, is still a Slant 6.
Until somebody builds a better cylinder head for a /6 they have their limitations.