I have a good foundation lol and to the other guy that said it won't last long I strongly disagree. I have a 450 horse engine now I've been running for 13 years....Cast crank to boot. I also have available to me large port commando heads with w2 offset rockers(pushrod holes are moved over on these heads) and a .640 mopar roller cam
I’m only slightly surprised that you have good parts and that you purposely held back what you have. You left it to a guessing game of varied answers and suggestions.
Why would you turn this into a game?
What’s the deal with those heads as cast and do you know anyone that has experience in porting them? I personally don’t know how far they can go but below is a good idea on a cylinder head to use for a NA engine, if you doing this as an NA engine.