I might be able to help you with that as I have made several head inserts for that engine. I'll look to see what I have, I might have an original but they were a rather bad shape. Do you have a way to measure your head clearance?No I don't have any way to measure head clearance. When you say you might have an original in bad shape please explain. Motorman
I just looked and can't find a factory head. The heads I made were for Glen Dye piston/sleeves. I don't know if one will fit. If you can't find one you could send me your engine for a custom head.I send you a PMMotorman