I believe that I still have the pieces that I cut off. It would be a simple matter to thread the pieces I cut off, cut a threaded 5/8-18 grade 8 bolt (might be a 3/4-16) screw the two pieces together and weld them and machine or grind them back down. I am also a certified welder so I fully trust that I can weld them to hold.
I figured that there was an engineered ratio between the uppers and the lowers. I have my upper mounts on the differential tacked so that the mounts are even with the top of the diff housing. I thought about putting them closer together but was concerned about the clearance above the differential. Giving it another look, I think I have plenty of clearance. By moving them closer together I can lengthen the rods and still keep a reasonable angle of the the uppers.
The idea of the angle should be, as I understand, to keep the differential from shifting side to side. The less angle, the more possibility of movement. I would hate to go less than 30 deg. I will see if I can get to it in the next couple of days and see what I can do. I want everything to be right before it is welded. I appreciate everyone's input. It always helps to kick ideas around in unfamiliar territory. BTW, thanks for the pictures from everyone.