One thing about SeaFoam . . . here many are trying to get alcohol and ethanol OUT of their car's fuel system and SeaFoam puts MORE into it! Not sure how it unseated Berrymans B-12? The "decarbon" trick used to be a glass CocaCola bottle, 1/2 full of ATF, 1/2 full of water. Then have somebody (hopefully) keep the throttle open enough to keep it running as you dribbled the shaken-up mixture into the carburetor's venturis. Made lots of noise, lots of smoke, but after it all cleaned out, somewhat better. Berrymans worked well, too, 1 quart in the gas tank. But the best decarbon I found was to just drive the car for an extended Interstate cruise (or similar) to
CBODY67