The clutch looked bad, (as expected), and there was a bunch of wool looking stuff inside the bellhousing. Still not sure how it got there. 😵
The PTO input shaft has some rust pitting on it where it was enclosed for so long. I'm thinking that they are OK due to not being on the entire spline area where the PTO clutch will be grabbibg for power, and because the biggest PTO load on this will most likely be a 4 basket tedder.
Sent the block, head, crank and flywheel off to a local machinist. Head was nasty but cleaned up OK and got a new valvetrain put in it. Flywheel got milled. Crank was ground .010" under. Block cleaned up OK but had .060" rust pits in cylinder #1. Before I could give him an answer and could do some reading on the pinhole cavitation issue, he bore #2 and #3 .020" over and put a sleeve in #1 bore .020" over. So #1 has a sleeve, #2 and #3 were just bored. Over on the other forum, I was told this was a mistake. Guess we'll see.
Engine went back together with little issue.
I knew everything would need cleaned up, and I would want to paint everything just to primarily stop rust. So I wire wheeled, sanded, sand blasted, taped and painted everything as it went back together. Long process but I think it looks good now.
For a reference, everything from the double clutch assembly forward has either been replaced with new, or rebuilt. The rear tires and rims were junk, so those are new. Parts are coming to redo the rear axle seals, bearings and brakes.