C3 Spindles & Front Brakes On A Second Gen?

[Z-28 Roadracer]

I saw an article in Hot Rod about the first IROC cars (4/21 P10) where Donahue put C3 spindles on the front and brakes on all 4 corners. Are the C3 spindles a "bolt on"? (The rears were full floating Ford 9" built by Moser.) Is the spindle taller and does it improve the camber curve?



I'm a fan of the JL8 package Chevy came up with for the '68-69 Camaros and Firebirds and if it's a bolt on, it would be cheaper than the REDUKO system Holley came up with. This would be for my wife's '78, it already has B body 12" rotors on the front and a T/A disc rear but I like the better calipers and thicker rotors from the 'Vette.

Has anyone tried this?