Ok, did a search and only found one thread on it. Maybe I'm using the wrong criteria. I have a 10 bolt up front in one of the 74 Blazers w/ the full time NP203. I wanted to put Warn premium hub locks in but according to the post I saw, not a good idea. Why is this? And, what do I need to do? Do I need to break down the NP203 and do the part time conversion as well? I really didn't want to mess with the TC, just keep from running the front hubs all the time. Can I put in the hubs and then just let the front driveshaft and axles keep turning, but not the hubs? Will this put excessive wear on the front bearings/hubs? I just wanted a bit more street driveability. I'm now wondering what the other Blazer I bought first had as a setup. It had a D44 up front w/ 8 lugs w/ Warn Premiums and a Corp14ff rear but still had the full time NP203 TC. Did the guy I bought it from Install Warn Premiums on the D44 and then just run it in Hi-Loc maybe? Or maybe I should just leave it full time four wheel drive since I'm going to sell it reasonably soon anyway? I though I might drive it for a bit before selling it.