How hard of a swap would it be to put a ZF5 into my 96 f350 4x4. It has the C6 and I want to get anything better than 8 MPG. I have done numerous tranny swaps before but never with a ZF and Im wondering is there anything special I need to know about them? I am looking for a ZF5 47 also not the 42 so If anyone knows were I can find a good one I would appreciate the help locating. Also, how much abuse can that tranny put up with behind a 460?