If its a true BowTie it could go for 25K or more. Depending if its a true BowTie as you state. I seen Camaro's go for 35k at Barrett Jackson restored.
BowTie = all original factory parts from the bolts to the chassis.
I had a 68 RS Camaro that was clean. Pump out head lights with a turbo 350 hooked to a 327 ci. We cruised Westwood every other weekend. Man I'm so glad gas was cheap then. Oh wait, its wasn't cheap. tap the throttle and watch the gas needle drop closer to E.