That's what I needed. Plumbing lines, cutting and soldering wire and buying a shortie driveshaft are all minor details I can achieve. I just wanted that wheelbase difference. I'll check to see if the cab to bed and other transition fittment measurements are good several times before the torch / sawzall comes to life. Anybody have a measurement from the rear cab mounts to the front bed mounts? I just dug a pit under a 56 parts truck and wrenched off a clutch set from the pedal to the bellhousing, the brake pedal and master cylinder and also found a good set of hood hinges. This is all to replace the 79 chevy blazer pedals that someone installed in the 55 I am picking up.