I just purchased a 68 Dart 270. I have a 400 plus hp 360 magnum that I am going to put in it. It came with a suregrip 8.75 not sure what ratio it has yet. Need to pull third member to see. I also plan to put a 727 behind the 360. She has the typical rust on the floors and lower quarters and some in the trunk but pretty solid for the most part.