I voted for "Stock looking in and out but gotta mod the performance"
I built my Challenger to appear stock which it does from in and out but she has a few nice modern touches.
Modern sound systems that are tucked away nicely, headers/exhaust/muffler, Viscus fan package, electric dizzy, performance alternator, bigger rims/tyres, underside protection, new shocks, sound deadener everywhere....etc
I see it as restoring the car to a new standard, eliminating factory bugs, because, lets face it, Ma MoPar was rough in a lot of places like interior work and some on the exterior. They wanted big engines out the door - fast.
They were able to do this but our cars suffered a little in terms of craftsman ship.....
I can appricate any car stock or not as long as it gets driven.