OK what is all involved with changing out a 72 F engine tranny and t-case with a 75 or 76 2F with 4speed tranny and t-case. Will i have to mess with my drive shafts again? what other mods are required? I have a line on this set up for $600 with around 300 hours on a rebuild. I plan on doing a 350 in the next year or two but just want to run it this year and need some thing because i don't want to rebuild the old F. Any info would be very helpful as im going to pick it up tomorrow. ...Thanks