For your driveline,use the front shaft from a 0ne ton w/automatic,and have a driveline shop remove the front end of it and splice it to your old driveline. Don't forget to replace your carrier bearing while you have the truck down. I don't remember the name but there's an outfit selling a carrier bearing with polyurethane in place of the rubber,has enough flex to soak up some vibration but lasts forever.
I agree with the guys about parking brake-remember,all the "Park" feature in your transmission is relying on is a little hunk of plastic or potmetal-that's all that keeps it from rolling away.A motorhome might have something that'll work without having to replace the rear end. I ALSO agree with the big-[censored] transmission cooler,and I'd wire in an electric fan for it too. Also,use one of the deep pans available for it,cast aluminum if you can get it. (A trans. temp. gauge would be a very good thing,too.) For the shifter,you can build a tower to mount over where the old shifter used to be from angle iron,and mount a cable operated shifter on it,and upholdter some thin plywood panels to cover the sides of it.
As was pointed out.they use automatics in motorhomes and school busses,so it oughts work okay in your truck.
Speed
