I'm building one of AMT's 68 Roadrunner kits. I'm building it for a friend. He still has the one he bought when he came home from Vietnam. I can't find a 727 to save my life. You would also think every Mopar built had a Hemi in it. His is a 383 automatic. The 440 is fine for the motor too bad every Mopar that didn't have a Hemi had a 6 pack.