Thanks all! I plan to trailer it home, for a multitude of reasons, but mostly because I don't want to ruin anything and make more work for myself. I have a trailer that is large enough that I can load without removing anything. If it won't fit on my 32' dovetail, then I'm in trouble.

My grandpa has been dead since 2001, so nearly 20 years at best since it last ran. He retired from farming some years before then. I am confident that the gas tank is toast. Hoping I can find a replacement without too much issue. If I can't, then we have a whole issue entirely. I'm planning to head over there tomorrow to take a look at it and assess several things...exactly what model, motor, and issues are obvious.