Newbie here getting ready to purchase first truck and will be buying used. I am looking at two trucks and am curious as to how much an in frame overhaul runs, so I can budget a reserve stash should I need to overhaul an engine in the next couple of years, as both of the trucks that I am looking at have almost 500,000 miles on them. I already know to stay away from the 3126 Cat and will not even consider the purchase of one of them. I limited my search to wet-sleeve engines and have narrowed it down to two. One is a class 7 International with a tag-axle and the 530 HT engine. The other is a class 8 Volvo with tandem rears and a 500hp. Cummins. What is a good ballpark estimate on an in frame overhaul expense on theese engines?