btw...i found something that is really cool looking at work...a 4.6l powerstroke engine that is in one of the fleet trucks speaking of tractor engines and other engines other than the 7.3 IDI or 6.9 IDI....

On the topic of your engine, I know a guy that has run that exact same tractor for a long time...it gives trouble starting if not maintained properly other than that its bulletproof.