i am building a 66 and was thinking of the same thing. a FABO member called lilcuda had a 66 cuda all set up for road course, but of course at the time i was not building my car and didn't save any info, and it has since been sold.

fwiw, i am running FFI front and rear everything, 1.1 t-bars, OEM style 11.75 brakes, and heading to chassis shop soon for frame connectors, fire wall braces and some other stuff.