I have a IH 674 with the diesel 239 engine. The tractor developed blow by that finally got to the point that I parked it before doing more damage. I suspect a broken ring. I'm in North Florida and haven't found anyone that gives me the confidence to get them to repair and/or rebuild. I ran into someone that has some history on the tractor over the holidays. He said at one point it was getting diesel in the oil and was ran that way until discovered. Not sure if that's what led to my problem. I decided to put some feelers out for rebuilt or used motor. I found a D-239 out of a IH 695 with a one-year warranty. It's supposed to hold 55lbs of oil pressure when idling. It's $3K complete with manifold, injectors, water pump, etc., plus $750 core till they get my motor back. $250 is the shipping estimate one way. I also found a D246 that's still in a Hydro 84. It it supposed to hold 60lbs at idle. It's also $3K with a $1K core. Shipping is estimated at $300 one way. It also comes complete with injectors, water pump, manifold, etc. and a one-year warranty. Will the 246 bolt up to a 674? Other problems on fan clearance etc.? What are your thoughts? Thanks