I just had to pay membership to have acces to this forum I started my Suburban project two weeks ago, haven't done much than just figuring out what I'm against with. That 'Burb has been in our barn for a few years now. My brother bought it and started fixing rusted sheetmetal. Interior was taken pieces, all the doors were strippe down etc. For some reason he lost his interest on it, so we towed it to the barn. Then the 'Burb served as a donor, lost both engine and tranny. And then it just sat there, waiting for something to happen. We tried to sell it, with no luck. Three weeks ago I had an idea. Suburban is 2wd (no good), and I had a 6.2diesel, 700 tranny, two D44's, and a passion for 4x4's. Engine and tranny, and axle were left from my Blazer, that will be built for competition use. But that's whole other story. All these parts were also for sale, but maybe I had a too high price for them so no one was interested enough to buy them. I was thinking that maybe I could make 4wd out of that 2wd, and I only need t-case and suspension, and all small parts. After a litlle searching, I found that I could use radius-arms from Land Rover. Panhard maybe from Dodge Ram, and Y-link steering from Ford. It will have x-over steering, but for now I'm using Ford stuff. That Dodge panhard isn't best sollution because it has huge curve because of the D60 pumpkin. Something more straight would be better, I'll check what Ford could offer. Land Rover panhard is too short. It will have coils, but from where, that's to solved when I get everything else done. I have to fab new engine crossmember, that will also serve as a coil tower. Pic will come after I get something done. Couple of questions. Was the 235/85R16 tire optional on 1500-series Suburban? If it was, that means I could get legally 33" tires under the 'Burban. Yes, they are small, but law is the law, you can go 2" bigger tire than what was offered from the factory. Blazers had 31x10.5, but not 'Burbans. At least that was told on RPO code list. About the RPO's, does Chevy and GMC share the same codes? I cross referenced RPO list on the glove department to the list I found from the web (Chevy list), and everything else matched, but the tires. Maybe there is differences in production years?