Making my own 13" Brakes -- Need Advice

[Mrfixit]

Hello Guys -- I'm not new to the forum but mostly lerk. I've learned a bunch and want to thank you for you postings. Now to my situation:
I've got a 68 Camaro with a stock subframe and want to run 13" rotors for the front brakes and I want to make my own rather than buy a kit. I've almost completed the back using rotors, calipers and bracket from an '89 Pontiac GTA. All I needed to do there was to redrill the caliper brackets to bolt to my 9".

I'm pretty handy with fabrication but if I can save some time and stand on someone else's shoulders, why not. Is there anyone on the forum who's already completed the engineering for the caliper brackets? I'm pretty flexible on the which calipers although I'd rather stick to C4 or C5 factory units.

My car as it sits now:
Detroit Speed Quadra Link
Heidt's dropped Spindles
Unisteer rack and Pinion
TPI 350
700r4

Thanks in advance