Tom, I put a T5 with mechanical speedo in my 1941 3/4 ton about 10-12 yrs ago. I used an adapter plate made by Buffalo Enterprises with the standard T5 input shaft. I sent him my input shaft so he could machine the plate to fit. The splines on the clutch plate are different also. I used an 11 inch clutch made for an Astro Van with the original pressure plate. I had a few inches added to the drive shaft and the front u-joint changed to match the T5. Everything bolted in easily. I made a couple brackets from angle iron to mount the hand brake lever to the T5. This way no changes are needed to the clutch and brake pedals. You could probably swap the modified input shaft with someone wanting one for an AD truck.
