Ignition nightmares

I have a 79 Volare with 94000 mi. Runs perfect. It had the original ECU box, I pulled it and all the black insulation had long ago melted off. Still worked perfect but installed a new one and kept it for a SPARE!! LOL OK so someone will tell me in a month the new one will crap out!!! Maybe!!!!!!
I repotted one using 30 minute epoxy. As far as I know it is still working.