I've had this miss in the engine since I pick it up in February. It runs fine but has a miss while I'm cruising. Engine is a Gen VI BBC 502 bored .30 over with a 850 Holly double pumper carb. New MSD 6AL with a 7K Rev limiter chip. New MSD Blaster Coil New MSD Dist Trigger. New MSD Dist Cap.
Timing is set at 32° @ 3000rpm. I've cleaned the carb with carb cleaner.
It almost sounds like the carb suck a gulp of air right before it has the miss.
Many thanks up front.