I swapped a 5 speed out of a 1991 pickup into my 1975 pickup. I used the tailshaft slip yolk from the 91, but the u-joint is larger than the one on the 75 drive shaft. Is there a conversion joint I can use? 1” to 1.1375” Thanks, Tom
Second a driveline shop. You might have to have a new driveshaft fabricated if there are no available adapters to modify your existing shaft. I had to do this when I installed a GM 14 bolt rear axle on my motorhome.