The '71 was non-numbers 340 and they only replaced the suspension and drivetrain, no body work. Dismantling the 2015 Challenger was obviously pre-authorized since Richard has the relationship and is heavy into marketing for Dodge. I liked the upgrade to the 392, magnum force, big brakes, but didn't like the wheels they test fitted. I did get a kick out of how hard it was to fit everything and Aaron is obviously not a Mopar guy since he didn't know any of the fitment issues prior to starting.