Keeping 13 inch wheels during disc conversion

From personal experience on my 66. The Scarebird kit worked fine, but my original narrow width 14" wheels still rubbed on the calipers. I ended up grinding on the calipers to get the proper clearance.

I ended up ditching that set up and went to the big bolt pattern. Probably the best upgrade I made on my car. Endless possibilities for good brakes, aftermarket wheels and better quality/tire sizes.