Hmmm.....That is interesting....I never knew the oil pan may be backwards.....I don't think it will fit if you swap it, though......I'll have to do some checking on that, myself..... I know that Clayton is right about those cab mounts, though....You should be able to see where I chopped some off the ones up front.....The cab won't sit level, if you don't, but don't cut too much....The front portion of the cab will rub the tires....I did that and had to shim to compensate..... You are definitely on the right track....This is looking pretty awesome....