"I have a High Zoot Fox .35. It is bitchin. It has an ABC piston and sleeve.
What is the setup for these?
I also have what appears to be a standard L & J ABC Fox 35.
What is the difference between the High Zoot, which has a single window exhaust port and the L & J with a double window exhaust port?"
Read the post again. Both engines are ABC's, but with different exhaust ports. My guess is that one is a Fox ABC, and the other is one of the Commie ABC's that Dirt brought in and sold by GMA. Unless BriStunt has made an ABC for Fox .35's, or it's a Tony Cincotta Plasma setup? I just don't recall if these were made for Fox .35's.

Steve
OTOH, GMA always 'signed' his engines, at least on the head, and also on one lug, as I recall. I don't know about L&J and the rest of the tuners, whether they mark their products or not.