Product details:

Edelbrocks carburetors have no power valve to blow out from a backfire, the metering rods can be changed while the carb sits on the manifold, and they stay in tune! All-aluminum, with two-piece construction, ball-burnished bright finish or EnduraShine chrome-type coating. Available in Performer Series or Thunder Series, manual or electric choke, and 500, 600, 750 or 800 cfm.