Something isn't right..

What coil is he using? My MSD 8222 expoy filled high vibration blaster took a **** over the weekend. Thinking about the last time I drove the car 3 months ago. It was not happy. Would pop and sputter in deceleration. Went to start it Sunday and it would only crank, changed the coil and she’s running like a champ again...
Yes some brand new coil that has to be paired with the 7al...
Again it really makes me wonder why someone would sell a set of Edelbrock heads for $400... Think they may have had problems with them?...