I am running the edelbrock performer 600cfm manual choke carburetor, i need to figure out wich metering rod is the next step richer from the 7047 metering rods that come in the 1405 edelbrock 600cfm manual choke carburetor. I am running the 7047 metering rods with the silver step up springs and it has just a slight hesitation, i also have the accelerator pump linkage hooked to the richet setting. Im thinking if i ran the next richest rod up from the 7047 rod that it would cure it. I'm thinking the 7042 metering rod is the next step richer from the 7047 but not 100 percent sure, so thought i'd ask you guys.