MSD ignition conversion Kit.... thoughts??

Hello, I have a 72 dodge dart with 440/727 and am thinking about changing the entire ignition to the MSD with billet distributor, 6AL box, wires and blaster 2. Anyone out there done that? I've been having issues with my ignition... the car will warm up to operating temp and then die. Then it won't crank up immediately. The coil and ecu are really hot. I've replaced the coil, ecu and ballast. Thinking about getting rid of all that and spend the bucks. Whatcha'll think?