Boyd, I mounted my brake rotors outboard of the stub axle by using Coleman billet hats. I did this conversion (with Porsche 993 Turbo brake calipers) nearly ten years ago but I'll see if I can find the specs I used. Previously, I had been using Wilwood hats, mounted in the stock location. All I did was increase the offset of the hat by the thickness of the hub and made sure the I.D. of the hat was sufficient to go over it (the hub). While I was at it, I replaced my stock wheel studs with 1/2"-20 items. Before you attempt this conversion, be aware that some Pantera stub axles have a slight taper to the wheel register that protrudes from the stub axle's hub, so if you put a 1/4" thick brake hat on the outside of the stub axle, your wheels will no longer be hubcentric. This can be dealt with in a number of ways but keeping your wheels hubcentric is very important.