I have a 54 model with a 235 and a 4 speed saginaw transmission. The driveshaft is stock from a monte carlo (72 I think). I just recently swapped my rearend and leaf springs for some from a 4wd s10 Blazer. The problem is the universal joints are different. The part on my monte carlo driveshaft is a little smaller than what I need for the s10 rear. The caps with the bearings have a smaller diameter. What do I need to do? Do auto parts store carry u-joints that have 2 differents sizes of caps on them? I hate to cut my driveshaft or buy another one.