the jets on a carter are the last thing to try, first go to edelbrock.com and download their carb tuning .pdf files. then go to ur local checker/shucks/kragen and pick up a set of return springs for the metering rods. try two steps fatter on the springs, if you get to the fattest spring and are still lean then go to changing the metering rods starting two sizes higher with the leanest spring and repeat until your plugs show a white residue on the arm and 1/2 way around the plug face. if your running no2 then tun until you get a milk-chocolate color on the plug arm and 1/2 way aroung the face.
hope this helps, i can get picks of my carter and the plugs if you need.