408 wont run

I just put a MSD setup in my 69 points dart. Real simple, find any wire that has 12v with the switch on and connect to small red wire on msd take stock wires off the coil and run the orange wire from the msd to coil pos black from msd to coil neg. big red from msd to batt, big black to grd. plug msd plug to dist. U can leave the rest of that crap hooked U just bypassed all or it.