If you want to use 6 lug rotors, here's what I did for my 70 c/10.
Contact Mike McGaughy's Classic Chevy. They're located in Fresno,Ca. They have a six lug rotor kit for $219.00 The kit includes the two 6 lug (12 inch) rotors,fully loaded
calipers,bearings,seals,brake hoses.Even the
spindle nut and dust caps. The rotors are made to fit 71,72 spindles,possibly even up
to 87. I know they fit 71,72 because I used
71 spindles. I'm in the process of doing a
full frame off on my 70 truck, so I can't say
how rotors function. But the quality of the kit was great.Everything installed with no problems, looks factory. The price for mine
including shipping to Dallas was 249.00, and
thats still cheaper than trying to piece together parts from the local auto parts stores.They also have 2.5" drop spindles for
$229.00 that carry a lifetime warranty. If you want more information you can reach them
at 559-226-8196 Here's their website:
www.mcgaughysclassic.com