I was trying to convince my dad to use Mk2 seats in his '57 Chevy, they are just too low though. Plus they're too costly to reupholster. He's going to use the mk3 seat I gave him though. Funny thing is the factory Mk3 bracket sit perfectly flat on the Chevy floor pan. That tweed upholstery is popular with the rodding crowd for whatever reason. Its either leather or tweed 99% of the time.