aXe, google "single cam offy", there's about an hr's worth of reading there, same with "2 cylinder Offy". A friend sent me a picture this week, of a V8-60 midget engine, that had the exhaust ports not all on the same plane, the end ones were higher up on the side of the block, and the middle one was lower, plus, the block seemed awfully smooth to me. Old feller from Madison, In owned it, Heath was his last name. Bob!