Your Muncie M20 4-speed transmission was sold on Ebay on 5-7-08...
Transmission case is stamped: P8S29 18N352670
Seller id: dontmovetojersey
Seller location: NJ
Sale price: $500.00 (BIN)
Buyer id: suicidepan
Buyer location: Napa, CA
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=130220676073&indexURL=5&photoDisplayType=2#ebayphotohosting
Paul