Having to forego the little aft mounted B&C alternator necessitated a front-mount, belt-driven alternator. Which requires the belt drive groove on the starter ring that our starter ring did not have. After some frantic calling about Tommy located a suitable starter ring. Tommy was able to clean it up and paint it nice as shown in the pic. Now the problem, the new starter is for the 122 tooth ring, this is a 149 tooth ring. Send the starter back and get another one. Love the great folks at B&C.