Most of ya'll will remember my '67 M715 I got a while back.
I began working on it on a regular basis this summer. With the help from a 78 J-10 parts truck, I was able to upgrade the steering, brakes and wiring. Of course when your mating several vehicles together, it never goes as smoothly as it seemed before you start. The PO had started swapping in a 318/727 into this ride. In looking at the original wiring, it looked to be easier to just swap the harness over from the J truck. This led to another swap. Since all of the wiring would be in the M 715, why not swap the steering column over also. This eventually gave me the ability to use the key switch in it. This led me down another side track as I thought it would be cool to take the old clutch pedal out and swap in the wider brake pedal. Since I planned on upgrading to a dual master cylinder. Here's a pic of the progress as of about a month ago:
Swapping the steering box out led to some more fabbing and swapping out of other parts. Luckily for me, a buddy donated a mid 80s Chrysler Grand Fury with a running engine to use or part out as I need. Right now, I just changed out the water pump so that the lower radiator hose is toward the passenger side of the truck. This gave me room to install the power steering pump from the car. I'm in the process of swapping to a radiator that'll fit everything I've changed. If the weather holds out, I should have the radiator in and can start on placing the battery and getting it ready to run.
More pics can be seen here.