My motor (4.5"x 4.5") has a Jesel belt system. I lined up the dots when starting to degree the cam. It had BME 426 forgings, the rod big end doesn't get much bigger. It wouldn't turn all the way. Ended up the Jesel had to be installed 3 teeth off to get it anywhere close to being the ballpark. After that no clearance issue between rod/cam. This short block has cleared a 292@.050" cam. Doug
