454 Southwind Popping back at carburetor solved-- revised

The second I read the title of your thread, I said "coil".
I've had a lot of people I know complain about popping and backfiring upon acceleration or load. When I tell them it's probably the coil, they look at me like I'm crazy. 9 times out of 10, it's been the coil.
Been driving GM vehicles for nearly 50 years and had this happen to me many times.