Since I used the 14 x 4.5 wide rim wheels there were extra steps over drilling the rotors.
1)installing spacers
2)grinding corners of calipers
3)machining hubs
4)making tapered bushings
5)still even longer studs

I'd suggest the 5.5 inch width rims to avoid steps 1 thru 5 however I was into the installation & committed before I discovered this problem & notified Scarebird so they could change their instructions.

I have 18 installation & machining pictures & sketches for anyone using the narrow 14 x 4.5 inch wide wheels.....send me a PM with your email address.

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1965 Dart 110k, 225, Carter BBD Super Six, 2 1/4 single exh., sbp manual scarebird front disc, 7 1/4 rear 2.94 sure grip, 14 x 4.5 OEM wheels, 833 OD with hyd. throwout bearing, HEI, electric fan, ram air/heated air, Accusump. http://plymouthcarclub.com/