[MotownMadman]

I have seen manual disc brakes in the past, normally on a race car where it was a concern over loosing vaccuum, or the engine not producing enough constant vaccuum because of high performance build to run the booster. With the unspecified paint code, heater delete, and high performance options as well as manual disc brakes it would be safe to say this car was ordered as a race car where the owner was going to paint it in a specific race paint trim. Car could have come in primer or painted a specific race trim color at the factory. Factory race car if everything you described is original to the car.
Thanks,
Motown [img]/ubbthreads/images/graemlins/beers.gif[/img]