Edelbrock S.P.-2P. 318 2V Does it even exist??

Guess it was the Rochester carb! Joking aside,
first time I heard of a loss in MPGs. Bet you were a little pi$$ed off, having spent a few bucks...
Second time...

My buddy did the complete Ebrock system to his 454 dually...I used to haul my dirt car one night and couldn't get 250 miles on two tanks if fuel.