I figured I'd share my brake upgrade with the forum. I have an 88 4x4 Suburban and I am slowly upgrading it. This upgrade needs 16 inch or bigger rims depending on rim shape and fitment. I'm running 17's. Here's where we start, a stock 10 bolt front end I'm going with Hummer H3 four piston calipers and rotors in a disk over hub arrangement. The brackets and idea came from Thorparts.com, he's using a GM 10 bolt front and machining the brackets and hubs to integrate the ABS brake system to a solid axle conversion for the H3 Hummers. Less involved for us squarebodies. Take your hub assemblies apart, cut the outer hub down to 7 inches, drill the lug holes to fit your choice of lugs, and basically bolt it up. I went with larger 14x1.5 lug studs from a 02 chevy 4x4 front. The H3 uses a larger center hub so it slips right over, only the flange outer diameter needs cut down to fit the disks on. My local parts store did it on a brake lathe, easy and quick. My eventual goal is to swap in a complete rear axle from a 99-06 Silverado, giving me matching rear disks and a parking brake, with matching 14x1.5 lugs. With the adaptor plate and caliper bolted up Uses slip over rotor and calipers from an H3 Hummer 2006 and up.Best fit for me was 39/64 holes to fit the late model lugs. I opened up the hub and rotors with a 39/64 drill bit, but the holes could be a couple thousands smaller. It was more than close enough for me, I did use red Loctite when installing the lug studs. The brackets make it a basic bolt on affair. Other than what your truck came with you need: thorparts brackets 39/64 drill bit (though a couple thousands less would be perfect) twelve lug studs and nuts from the front of a 2002 Silverado rotors and calipers from a 2006 or up H3 (normal one not the special edition) and brake lines (uses the same 10mmx1.5 banjo bolt as my stock burb), as I have a 2.5 lift, at Advance Auto parts, getting Dorman H38620 and H38621 @ $15 each. Correct for both ends and right at 4 inches longer. From a 99 Tahoe I believe. Here's the completed hub with studs And with the rotor slipped over A top view The final issue I ran into was rim to caliper clearance, I had to use a 1/4 spacer to get the rim face from contacting the caliper. Rim choice will be important with this install. I'm sure a set of factory H3 rims or Silverado rims with the center opened up would fit just fine, then the choice of offset enters the picture. It's getting zero vibrations, clean smooth running, stops very well even though I still need to final bleed and bed the brakes. On a last note, once I get to swapping in a 99-02 Silverado rear axle, I'll also change the master cylinder to the 02 Silverado style. Should bolt in with a single thread adaptor like the OBS to NBS upgrade.