Hei conversion troubleshooting

So, I made the drive down safely, have been daily driving the car and I think I am ready to give HEI a try again. I have replaced the wiring harness, have my HEI harness/relay all soldered up and ready, and a fresh 4-pin ECU. Have gutted an old BR and soldered a 10-guage jumper so I don't have to cut up my wiring harness. I am scared to permanently mod the wiring harness until I am dead sure the HEI will work reliably, since I depend on this car as my daily driver right now. I know the HEI will be rock-solid once I get it running right.

Car is running ok with points but it is very hot down here, coil gets pretty toasty and it still fouls plugs (not terribly, but i'm doing a lot of stop sign driving and idling down here) so its time for HEI.

My theory (fingers crossed) is that my overvoltage condition (fixed, new VR and grounds) and hot/lean running condition (fixed, radiator clean/coolant flush and carb adjustments) was burning up ignition modules. Really hope it works this time.