585 Moline

So im looking for a bigger horse to help out my Oliver 1955 on the farm. She has been holding her own up until now but this fall we bought a 9 shank Glenco Soil Saver and while the ol 19 handles it alright on flat ground, she struggles quite a bit on the hills. A friend of mine ran across a Oliver 2655 sitting next to a barn about 15 minutes or so from home and since Ive always wanted one to begin with, I kinda want to go look at it and see if the guy wants to part with it. I believe the same tractor was on craigslist from the same guy about a year or so ago, so my guess is he will probably let it go unless somebody shot him an insanely lowball offer and just straight p!@@#$ him off to the point he wont sell to anyone, which is known to happen. Question is what should I be looking for? I know to check for the external oil pump on the 585 but that's about it. What else should I be looking for on the motor and the tractor in general aside from the typical wear points you look at on any 4WD. I asked this over on the Oliver board but they kinda missed the point of my question and were trying to tell me what other tractors to buy instead because they were better. I know the A4T's had their issues but ive always wanted one and Im not scared of a project and man do they sound like a hoss with a straight pipe. Plus everything I farm with now aside from that Glenco, a Mathews Stalk Chopper, is Oliver and I have no intentions of breaking that streak for the time being.