I recommend an A2. The M35A2 will give you the multifuel engine which is pretty simple in it's design, and can be worked on rather easily. The truck is also not chopped and slapped back together as the A3 is, to accomodate the larger CAT engine. The hood needs to be lengthened, and widened, which also requires the whole nose to be closed up to make room for the radiator, oil cooler, and tranny cooler that accompanies the automatic transmission.
I wanted a '71 soft top, no heater and found one close by which was cash & carry. No waiting around for auction paperwork and release from GL. (which can take months)
The truck on delivery, was as it left the military, and was complete in fit and function.
I updated what I felt needed to be replaced, and spent the money to restore it and make sure I would have a really fine looking truck. I wanted it to be prototypical and look as if it was currently in use.
I am glad I did. It runs great, and likes to be driven. I hope to have it for many years to come.
I had no illusions of speed. It will drive on the Expswy at 55mph, but it is slow around town, and loud.
I LOVE IT!