Perhaps I should have looked closer, but the ebay link you provide for the shoes for the 84 ATC200s shows part #306. Also, the one I found for the 83 ATC200 has that part number.
If it was me get them, the worst that could happen is you would have a set of $12 shoes that don't fit.
Current toys..
1986 Honda 350X..trail bomb!
1985 Honda 250SX..my main mudder
1985 Honda 250ES..Back in Black Trike
Current non-trike toys:
1990 Honda TRX300FW
1995 Seadoo GTX
1998 Polaris Indy Lite 340(Nearly new looking)
1998 Polaris Touring 500
1998 Club Car (electric)