I had the stock K5 shaft in there so I bought a used CUCV rear 1350 shaft as a cheap upgrade. I just took it to a driveshaft shop and got it shortened and balanced and new Spicer U-joints at both ends. I get it home and crawl under the blazer and the shaft is too long, sucks! I measured center to center fine, but I missed that the yoke on the slip part was a little longer. Than I also noticed that with the 1350 joint and 4" lift with such a short shaft it looks like it may bind on the slip yoke end. Now I got a bunch of money tied up in this shaft and it may not even work. Help! Does anyone run a 1350 non CV shaft on the rear with 4" of lift?