I have a set of Pro-Topline heads 320cc runners, was thinking of using them on my 502. Does any one have experience with them?

Pro-Toplines heads were made down in New Zealand and imported into the US until the company went bust back in 2003. I believe RHS cylinder heads (a Comp Cam company) bought the tooling and is making some of these heads today. I have heard that sometimes the original Pro-toplines were a little rough and some with problems not clearly identified. I believe Kieth Eikert sells them now but i don't know which group he is selling. I would say they are a pretty good head when equipped with good valves, guides, springs retainers,etc. and they should be carefully checked by a good head shop for specs. and conditions. With a good valve job, bowl blend and clean up they will probably do a fine performance job. Just make sure they are "right" before you use them.

Ray @ Raylar