I just recieved a mint condition 1975 chevrolet silverado from my grandpa. Its a K20 camper special, and everything is still stock. It has a 350 engine, th350 trans, and an np203. I want to use it to tow my K5, and am wondering what I should do to the drivetrain. The motor ticks pretty good, but it runs well other then that. I can feel quite a bit of slop putting it into gear, and i am thinking that its the chain in the 203. I have access to a 1980 np205 and driveshafts that I can have for free. How hard of swap would this be? Doable in a day? Info needed! Thanks a ton!