Sorry I've been away. Things are busy what with looking for a new tractor and all.
The condemnation came down to a combination of low compression and "I can tear your whole front end off to check out the timing for Lots of money if you want"
I'd do a full overhaul on this engine if I was guaranteed that it would fix it, but no one who looks at it can tell me what's going on with it.
My plan is actually to bring it back and part it out. I've done some estimates based on past Ebay auctions and I figure that right now the tractor's parts are worth the difference between the tractor's value and the repair costs.
That means I'll be tearing it down. My plan is to tear it down systematically and check things out as I go (AKA autopsy). If I find a "smoking gun" that's the obvious culprit, I'll fix it and put it back together. If I don't, then I'll sell off the parts and get something new (wouldn't it be nice if we did take up collections for grieving "tractor widowers").
I've already started liquidating assets to build capital. I sold my extra generator, I've got the old sedan on the block, and I'm probably going to sell the extra motorcycle when the snow has melted off a bit.
I've already started looking at some other "project tractors" out there as evidenced by this post
this post
I guess the point I'm at now is that I've decided saving this tractor is not the top priority, and if I get it running it will be a nice surprise, but I really don't expect to get it running.