It runs! Not well, but it runs! Gotta sort out an issue with the carb and fix an oil leak on the remote filter line, but it runs. Builds good hydro pressure, moves, and the only leak seems to be the filter line. I think I just might have myself a good worker!
Driveshaft is quiet, the steering seems responsive-ish, the hydraulics should work, I think this 317 instead of the other nicer one was the better choice.