I know that the drive shaft needs to be shortened 3 inches. I don't want to cut my original drive shaft. My truck is a 59 1/2 ton all original drive train.
I procured another drive shaft and now find that the universal joints are not the same size. The caps are different sizes as well as the width across the joint. I seem to remember 40 yrs. ago you could buy a conversion u joint that would have different size caps, but I don't remember if the width across the caps were different. Any ideas from those who have done this already? How did you do this.

Thanks

Tommy
59 apache 1/2t
261 short stepside