A grandfather who sold used cars for 60 years, a mom who beat the neighborhood Corvette owner in a full-size Pontiac, and a dad who won a drag race at 69 — this is a family where muscle cars run three generations deep. From a Mach 1 Mustang to a Dodge Super Bee to a 2016 Mustang GT painted in a nod to Steve McQueen’s Bullitt car, the cars change but the obsession never has.