We have a 1992 8570 that we got from and action that has a lot of hours, the elavator cans were worren out, the flinting on the front of rotor worren out, the spline form rotor plainter in to rotor worren tell drive motor wobbels (stell have some problem with that). Our has the 8.3 engine with only 220 hp which is no much biger then 1660 IH. They have high ideal set a 2600 rpm, the engine was rebiult at 3000 hours, 500 after we got it. The header that came with it (9222) is what white use (no mf) so I don't think your headers will fit with out adapter. We have only replaced 3 bairings, and I think we will git a lot more hours out of it. MF 850 we used had alot of trouble with the shoe and drive for the shoe, on the 8570 no trouble there, cleaning fan blade broke this year. I do like driving the 8570 beter then the 1460 IH .