About To Just Give Up!!!

I bought the Dr Diff u joint lately. I don't remember what brand they supplied. Here were their specs:

Hard to find combination U-joint mates a small 7260 Mopar driveshaft to a large 7290 Mopar yoke.

PLEASE CHECK THESE DIMENSIONS TO MAKE SURE THIS IS THE PART YOU NEED!

7260 U-joint dimensions: 1.078" cap diameter x 3.250" overall width

7290 U-joint dimensions: 1.125" cap diameter with grooves x 3.625" overall width