[Mike C]

Big block heads can be a challenge if you aren't building your motor from scratch. The problem is that most open chamber performance heads are 121cc which will KILL your compression.

I would be looking at the Edelbrock Oval Port heads which have 110cc chambers. They also mill that head down to 100cc as well for late model TBI 454.

You will need to call Edelbrock and ask them about your piston compatibility if you go that way. I have some closed chamber oval port heads on my 427 (290 casting) and I have looked at the possibility of going to those heads (a) if I need to drop the compression due to detonation or (b) just a more powerful head.