Overview: Mark assists Justin in buttoning up the rear-end details of the 1970 roadrunner convertible. Justin gets to apply a full-length dust trail stripe and finish the roadrunner off with a detailed application of its factory (and some not so factory) assembly line-markings. Speaking of roadrunners, Will paints a super-rare, 1 of 137, 1971 roadrunner, 440 6-barrel, 4-speed. And Mark dives into a detailed detour of this rare bird's drivetrain. Finally, with a beak-to-tail inspection of the 1970 roadrunner complete, this car is green-lighted by Mark to hit the road.