Also got this 450LP tractor to complete my 450 set. Definitely needs serious engine work and a new clutch--transmission and TA work OK. Has a knock, poor oil pressure, and readily overheats. Once I found the correct LP setup, the tractor starts right up. Kind of weird driving this and peering past the fat LP tank. Fun fact, my local LP supplier will and has filled the fuel tank directly.
Pulled this tractor apart a couple weeks ago and got the block cleaned. Found it cracked through the center main bearing web and into the camshaft bore. Block is junk and I got a another one. Crankshaft front bearing was trashed, rest were OK. This is going together with new sleeves and pistons.
Chris B.