hello i have a 85 dodge b150 van with the 318 727 and newprocess t case. the axles are out of a 81 chevy blazer ,6 lug 1/2 ton 3.73 ratio. im looking for the conversion u joint .but i dont kno how to identify them by numbers? what is a common driveshaft yoke on a ramcharger with a 318 4x4? and what would be the common yoke number on this rear end? ive found u joints but they go by numbers (EXAMPLE; 7260 X 1310 .DODGE TO GM)

CAN ANYONE HELP??

JIM