What are the differences in bearings? If they use the same bearings, or even if they don't, adapters could be made. We need a wide5 pattern hub with the same track width as stock. There has to be a way.
Ed, how thick are wheel adapters? They have to add at least 3/8", probably 1/2".
In my old Spyder, which had the same body as Beck and TR, I had wheel rub on the fender tops. It got really bad when I went from the CSP brakes to Airkewld. I moved the wheel centers myself about 3/8" and had no more wheel rub. It's amazing to me that 3/8" matters(3/4" total track).
I believe the CSP brakes add 3/8", and the AIrkewld ANOTHER 3/8", so 3/4" per side, 1.5" total. That's huge for track width/fender clearance. If you have drums or KG discs, you're good. And I believe with EMPI/SOCAL barbells, you're OK clearance-wise, but OMG the unsprung weight.........
On my new car I had Greg build it with a 2" narrowed beam, and solved my problem WITHOUT custom wheels.