This has been solved!

the wiring diagram I posted was not entirely accurate as it turns out. The way I had it was one of the field wires (blue) was all tied together with the MSD wire and ballast resistor wiring which I bypassed. I had that wire on the 4 post switch being shut off which was not turning the car off.

All I did was remove the switch from that circuit and make the other field wire (green) go to the switch in the back and that did the trick. The car shuts off immediately now when you hit that switch!