Couple of things;
I have modified a pr of Coupe 20VT discs to fit my tarmac rallycar. Made brackets out of Ali to fit my radial mount AP's. DS3000 pads.
Worked a treat.
These are now 'spare', as I rebuilt the whole lot onto 280mm G60 golf discs, so new brackets. So I could run generic 15" rims. These also work a treat.
They run hot.
Well they would , wouldn't they, tarmac rallying. Pads don't last long. No surprise.
My tuppenth worth
Jon
pm me if you want to buy the fiat discs/Ap brackets. If I called them ' custom billet design ' they may be more saleable..