Funny you should bring up the alternator. That's a missing piece of the puzzle. Cannot decide to keep the existing single field or upgrade to dual field round so have not purchased one yet. Thus know nothing regarding alignment issues yet. p/s don't have. Thought a sanding flapper wheel would work to enlarge my arbor shim. Looked at pinion shims but no specifics were listed. Might be able to get details over the phone.