New to the site. I have a 92 Pete 379 b model cat with a 15 speed. I pull cow pot and hopper. Just got me a 81 359 with a 400 cummins big cam 2 project truck. Truck has been sitting 10 years and owner told me truck was getting water in oil when they parked it. I got the truck for free that's why I got it. Once cow hauling picks back up gonna go ahead and overhaul it.