I had a 70 Challenger R/T 383 Magnum,4 speed,and one night I took it out,and attempted to duplicate those full throttle speed shifts,after watching Vanishing Point! It was a blast! I also use to enjoy driving it home from work,and going down this winding back road,it had winding corners that went up and down hill,and you could not see around the corners to see if anything was coming! it was a constant up shift,down shift from 2nd to 3rd,then 3rd to 2nd it was a lot of fun. I tried to go faster everytime! I sold that car,but I currently own two Challenger convertibles,one 383 4 speed Challenger R/T Hardtop(not the same one) and a 71 340 Cuda!