Another guess my SB 340 et 1/4 mile :)

On topic

Three is a good shop and trust I went thru carb glitches and this is what we do now a place in so cal called Csu carbs one man show is the best u spend 350 bucks and he will make ur car run like its injected. Trust me its so worth the money .

If u don't have the money take the carb totally apart,rebuild it put floats with 3 threads showing on the top showing, screw the idle screws all the way in and back them out 1 and a half turns,then run the orange pump cam in primary and the pink pump cam in the rear. And then start it snap throttle if it hesitates go bigger squirter size also if u run bigger then 37 run the hollow screw. And send me ur email and ill send u a detailed guide on hownto tune fine tune ur carb..thanks