I bought a 1987 f350 with a 17' alum jerr dan body but has a wore out 6.9. I also have a 1990 w250 dodge I would like to know what would be better to run a 2 wheel drive getrag with a pto? of zf 5. the truck now has a zf 5 but it is junk. Just would like sum input the w250 will be parted out axles trans tranfer but I need a good reliable tow truck. thanks