PBR Small Block Heads

Knowing John, I bet most of his ported heads are in use.
I'd be very interested to see how they compare to other ported versions.
I agree. It may be a big of a long shot, but we’ll see what happens. I think it was @Mean416 that mentioned how nice it would be to get a CNC program made from John’s ports to keep them available. If the owner of a set of his heads wants to do that I would like to help make it happen.