Which yoke??

Were the u-joint goes is 2 1/8" wide for the 7260 and 2 5/8" wide for the 7290. The 7290 will be sufficent for a high 10 car, I am running a 7260 rear joint on my low 11 car (as long as it is an auto not a stick). Not all 727 have the large joint. I have more small joint yokes than large. I have a 1974 D200, 1974 B200 and a 1988 B350 and all have the small joint. The D200 and the B350 have Danas and still have the small joint. I have two spares that are 7260 that also came out of pickups. The only large yoke that I have presently came out of a 1969 C-body. I have found that the bigger cars is were the 7290 joint drivelines are. At least with my parting of cars and bone yard hunting. I have only run across one 727 spline count as far as slip yokes are concerned.

Also the 7260 has a cap diameter of 1.078 and the 7290 has a cap diameter of 1.125, so you could keep a 7260 cap in your pocket when you go bone yarding and if the cap is smaller than the yoke you have a 7290.