Twist the key on Chad Bonneville's 1969 Plymouth Barracuda and the 410-cube small-block fires obediently. It settles into a mild lope, its D-1SC Procharger whistling faintly over the sewing-machine ...

Some cars sleep so long they forget they were born to hunt. Then one day, someone turns the key, and that old heartbeat returns — uneven, raspy, but alive. That’s the sound you’d hear if you fired up ...