Denny, there are 2 "expansion plugs" on the Novak list of 67 items, #1 and #14, on the link Tim pointed out, and they are noted as NOT part of the master kit, which appears to include about 16 items
as for Cletis having a bug up his whatsit for you, his job is to sort out posts that more properly belong in the forums devoted specifically to them, and hopefully any less experienced members will be better able to find a thread about 'key parts for a SM420 rebuild" in the transmission forum, either by using some common sense or the search engine here which has an 'advanced' version that allows searching appropriate individual forums
Bill
