Cap OD for a 7290 Yoke is 1 1/8 inches, for the 1350 is 1 3/16 inches. on a 12.5 sec 3600 lbs car is the step up worth it?

When I shortened my driveshaft for the GV I went with a Spicer solid 1350. The u joint can be bought anywhere. I doubt I will ever have to replace it. My car is driven to the track and run at least once a week. Put a 26" tire on and your 60' will improve.