Would not even need a modern Mustang II, just an MPC release but I believe it was retooled to the Pro stock kits (FireFighter, Midnight Express) Using a modified MPC Chassis and retooled interior and AMT body would give us a nice Mustang II kit. As for the 71-73, Retool the grill/headlights to interchange, new 71-73 front bumper, and a chassis with the correct shock towers and firewall. The AMT body is fine. and the MPC interior tub works too (Front seats are horrible though)