B spindles vs. CPP C5 conversion for '68 Chevelle

[68Malibu383]

I'm interested in improving the braking and handling of my '68 Chevelle. I plan to do some autocross and non-competitive and mild open track driving. I have run a late model Mustang Cobra at autocross and open track, so I'm familiar with the demands placed on the brakes/suspension.

With the B spindles, I can't imagine that a 12" rotor would be adequate for a 3,500 lb car running open track. I know folks do it, but anyone out here have any real-world experience to share with B spindles running open track? If so, what rotors, pads, cooling?

The other option would be the CPP C5 conversion with 13" rotors. I'd probably just buy the spindles and hubs and buy brand-name rotors, pads and reman I'm interested in improving the braking and handling of my '68 Chevelle. I plan to do some autocross and non-competitive and mild open track driving. I have run a late model Mustang Cobra at autocross and open track, so I'm familiar with the demands placed on the brakes/suspension.


With the B spindles, I can't imagine that a 12" rotor would be adequate for a 3,500 lb car running open track. I know folks do it, but anyone out here have any real-world experience to share with B spindles running open track? If so, what rotors, pads, cooling?

The other option would be the CPP C5 conversion with 13" rotors. I'd probably just buy the spindles and hubs and buy brand-name rotors and reman vette calipers from a source I'm comfortable with. Anyone have any rear-word experience with this setup and how much handling is improved? I can't find much feedback on this conversion. I know folks complain about CPP copying another company's design, and I'm not interested in hearing about that.