Kore3 has a kit to adapt the C5 Corvette brakes to the stock spindles. You can buy the entire kit, or just the brackets and piece together your own... IIRC, the front kit is under $630 if you modify/use stock drum hubs ($930 for billet hubs, and can go higher with some options), but you will also likely need a new master cylinder...I will be redoing my front end on my 70 El Camino with SC&C stage 2 +kit. I added baer disks to the rear, I would like to upgrade my front to bigger disks to match, but I can't find anything reasonably priced. Also would like to replace my front springs with something stiffer without going to low(headers).
For $630, you get instructions, brackets, hardware, braided hoses, rotors, calipers and pads...