I bought my first tractor a (77 Sears 10/6) a couple of months ago with no mower deck. 2 weeks later I bought a parts tractor (GT 14 - same as yours) that came with a deck for $65. I had a little trouble figuring out how to route the belt to the tractor, but eventually got it. The mower deck Model No. is 917.253570. Let me know if you want me to take some pics that show the set up.