Hi: saw your post on the onboard starter. I also have a problem getting one to fit. Chassis is 17.5" id at rear motor plate. This might be an inpossible problem to solve. What starter and flywheel do you use. A std Chry ring gear or a smaller one like a Chev. What starter? Chry or Chev or Ford? Then how big of a clutch could you run? Thanks for any help.