Iirc its an '86. The only other problems with the tractor are:
somebody rewired it, they did a poor job. (i have rewired some of it already i had to get the flashers working before i drove it down the road a bit)
I have rust problems on two of the rims, they are all filled with water/antifreeze, except for one, which will not hold air for more than 6 hours.
I looked through the handhole. It has the single clutch, I wasn't sure (never having seen a double clutch before) till i saw the difference between the two parts online. Its definitely a single. I ordered the parts this morning.
Keep us posted and Pics if you can.