Carter AFB/340 Tuning

If it is a Carter AFB then you can use an Edelbrock tuning kit which comes with a book and an assortment of jets/rods/springs. If what you have is an AVS you will have to use the AFB/Edelbrock flat rod caps.

If you run with heat blocked off on the intake you will need to run richer. If it is not blocked off leaner. If you run a 180 degree thermostat or a 190 that will also have an effect. Edelbrock also sells an assortment of accelerator pump nozzles which will fit the AVS, AFB, and Edelbrock carbs.