I have a 90 suburban 4x4 that has much rock rash and rust, but it has some mods also. (6" lift, 3/4 ton with 14 bolt, detroit 4.56 gears, 37" tires) I can get a super clean 2wd suburban with a bad engine very cheap. Has anyone got any experience in swaping in a front diff. into 2wd? Am i better...