Alright guys, here's the deal. I have an 84 SWB step side half ton. It has a rebuilt 350. I know that it still doesn't have the factory 2.78 rear end like the sticker says, and I want to turn this into a daily driver. I am getting the funds together as we speak to fix the air conditioning and get some decent used rims(which are hard to come by) so that I can daily drive it. My question is this: What is the most cost effective and easiest way to put an overdrive transmission in my truck and which one would you all suggest? My first instinct is the 700-R4. Ideas anyone? I tried the search tool, but I can't seem to put the right words in there or something as all it does is give me a thread for changing a 700 to a 350. P.S. I know that I will probably have to get a different drive shaft too. Any help on that would be greatly appreciated as well.