Crankshaft is 7/8 for 2 1/4 then tapers off with threaded hole. Any sugestion I appreciate , worst case is a new crank or cut this to 3/4 . Crank is gonna be the tuff part of this project. There's a throttle lever near oil fil down low on base of block , intake is missing aircleaner that I have and it has an optional heater for cold startups. Defiantly gonna post a video . They make "clones"of this engine too .