Thanks for your help Longbox.
If I were to go after a '80s/90s van. What model would I want? I've been to several different salvage yard and every E250 full float axle that I find measures the correct backing plate distance (when I say correct I am refering to what is currently in the truck), but the wheel mounting surface is about 4-5inches too wide. Any suggestions?
Thank you all for your help so far.