I have looked at more than a few of these swaps . Dont do it. It is not straight forward nor does it look very good when done even if you are a great fab guy. The front is too narrow. Your stock bed does not fit without a lot of chopping. Keep and eye out you can buy many of these aborted atempts for next to nothing. I just purchased a 48 that was attemped for the nice sum of 200. I sent the s-10 frame to the scrap yard the next day and found a nice stock frame from another s-10 project gone bad for 50 bucks.
They even make a real mess of a kit to do it. Stick with your stock frame and update it. Much better looking and drives just as well.