I'm just wondering, what are you doing with your burb that makes you need 3/4T suspension? The reason I ask is because it's not easy to physically carry enough in a Suburban to need the extra capacity beyond a 1/2T. If you're towing, well, that's a different direction looking at brakes, transmission, cooling, and gears. If you actually carry a lot in the burb, you could put on some overload airbags and be done with it. Brakes can be upgraded without swapping axles, so I'm just wondering if this is more of a conversion you want to do just because you have the parts or what?. Not trying to talk you into or out of anything, inquiring minds just wanna know what's your motivation?