Well, Jerry, I have dual Rochester b carb on my 1954 up until the issue I asked you about I have had no problems with the setup. My fuel mileage is off by 5 mpg average at highway speeds. I have not had it checked by my mechanic, he has been busy with the end of the year car shows. BTW the truck has 32000 miles since the engine overhaul. Jim, I hope you figure it out.