I have on my old engine, head casting numbers with DU3E, (came with my 68 302). However, the engine i think i have is 89 302. The heads that came with that are E6SE heads.

The engine block I have has a roller cam with it. Do you think I should Use my old heads on this 89 engine with roller, or use what It came with?

Are there going to be any difference with the pistons etc. I know the puch rods will be using the rolling cam ones.

Thanks!