Finally got my car ready enough to drive more frequent. (motor mounts). Now i have a popping sound coming from the carb when i accelerate. Took her on the highway and at 60 cruise all you hear is pop pop ppop popop. and a slight surge. at idle i can rev it hard and it will pop through the carb also. Any ideas? She starts fine. Has a Holly 600...edelbrock performer intake on a 351 w. Thanks in advance