broke down and gave my spar 1936 engina to someone to rebuild .when its done he will just switch them. meanwhile i can keep enjoy my36. he don t use a compture so i like a lisk of catlog i can get to order parts from.except for machine shop doing boreing he do all work his self. babbit is dependa on how they look. trying to do all work local said we might have to do babbit .but if not bad he can fix them. thanks