hello everyone this is my first post as I am new to this forum. thank you all for having me. I just purchased a 49e 3600 a month or so ago and have begun doing research to change the stance and drive train on my truck. since it is a long bed I am going to have to shorten the frame and the box so I figure I am going to swap rear axle out. I have searched on here but have not found a deffinate answer to what axle form a salvage yard I could buy that would be the same track width as a mustang 2 suspension on this truck. that is my next mod so I wanted to find a rear axle the same width. I plan on doing a four link and bags so it does not have to sit on the leaf springs in the same spot as the oem axle but I have no deffinate answer to how wide the 3600 8 lug axle is drum face to drum face and I have no answer on what is in salvage yard that would be very close to fitting and give me the disk brakes for the rear . I would post pictures but cant figure it out on here