rear end yokes

didnt relize the 83/4 pig i put in my rear end, had a large yoke on it, and my new drive shaft has a small yoke on that end .. is any one familar with joint they sell, that goes small to big on univeral joint ? iam not familar wuth the 7260 etc numbers, dont want to change the joke in the car any helf would be appreciated, dr diff sells the joints ,but i dont know what to tell him i need thanks