It came out of a short wheelbase 4200 i6 so it is an 8". We do our own drilling using jigs made from axle end lug bolt flanges. Axle is cut off flush with flange and then an OVERSIZE hole is bored out in the center of the flange. Adapter rings are made to give a tight fit onto the drum/rotor pilot on the axle, the jig is clamped into place, and then a smooth sided center drill that snugly fits the original lug hole is used to make a starter hole. This is followed by the correct drill for the lug. For a one time use you would not need to set up for adapter rings. We have a mill and an index table but the jig takes almost no set up time and is very accurate. On my 37 Buick which used lug bolts instead of studs I re-drilled the lug pattern right on the car (it was kind of an emergency). Photos:
Center hole in wheel is way bigger than axle pilot:
[img]https://i.postimg.cc/2qxxT1cn/drilling-hubs-002.jpg[/img]Adapter ring is turned out of WOOD (hey it's MY car):
[img]https://i.postimg.cc/NL2Hjy6b/drilling-hubs-003.jpg[/img]Custom made transfer punch that fit holes in brake drum was made to mark for holes:
[img]https://i.postimg.cc/SXzhMpg0/drilling-hubs-004.jpg[/img]Finished, Original bolts are orange, new studs are white. Now any 5 on 5 wheel fits.
[img]https://i.postimg.cc/k63BVsFc/drilling-hubs-001.jpg[/img]
