I have 2 1994 F-350, crew cabs, both are 4X4's and they have the same 7.3idi turbo engines, and both have the ZF-5. The trucks are basically the same, even the same color(teal). The only difference from the factory is 1 truck has the 4.11 gears, and the other one has 3.55?. One truck has been...