These days, bright headlights are available for any car. The trouble with classic Mustangs is the wiring wasn't designed to handle the high-wattage lights. Another problem is the circuit breaker in the headlight switch can't handle the current. The cure is to install two relays, included in the Reenmachine wiring harness. The flat-faced Hella lights look trick, as installed here in Pete Waydo's '66 Mustang.