WHen I did the rear axle, I left it connected to the drive shaft and bolted the springs in place so I would not have to modify the driveline. I mis-measured a little bit. I thought the bed would line right up leaving about the 10" you are looking at. In reality, the bed is a bit long for that. I had to cut the bottom third of the centre rib in the front of the trailer bed (does that make sense?) to up and over the cab support mount. If you stand back from the truck at perfect right angle you can just make out that the rear axle is forward of the wheel well centre on the bed by an inch or two. As my dear old mother would say, "A blind begger riding by backwards on a horse would'nt notice." I dont know where she gets those or what they mean, so don't ask, but I think she's right.
Next project (there is always a next one isn't there!) would be to take a duece, whip the bed and rear axle off, install the m105 bed all the way back on the standard frame, install the single axle under it and make a quad cab. fab up long drive shaft and,Viola! Mega Super Duty. Ford aint got nothing on me
Cheers!
