With the advent of many new crate engines used for racing, most popular are the GM 602 and 604, we have developed 2 new carburetors. One a 650HP and the other a 750HP. Many tracks require one of the 2 carbs in stock sizing and appearance. We spent many hours on the engine and chassis dyno working out this combination. We start with new castings & fully machine the bodies for gasket sealing. These are totally blueprinted for sizing on all throttle bores. Boosters are blueprinted for maximum signal strength, centered, & fixture installed. All Fuel circuits including accelerator pump & metering blocks are sized & calibrated for maximum acceleration and power. We also make all circuits adjustable for easy tuning. We use special custom machined weighted floats for corner loading fuel control. After final assembly all carburetors are "Wetflowed" & fuel curve set . We leave nothing to chance providing rigid Quality Control procedures throughout the machining and assembly process. All AED Carburetors are test run before shipping. We recommend the 650HP for the 602 crate engine in all applications. For the 604 engine we recommend the 750HP version for larger tracks or when the rpm band is fairly narrow. With a short track when the rpm range varies more than 2400 from minimum to maximum the 650HP is a better choice. New Combination for 2012 & updated Billet Components. Call for pricing!