These Keith Dorton Model 2300 HP two barrel carburetors were made
just for Circle Track racing. Per Keith's recommendation, Holley deleted
the choke hardware and related machining provisions for smoother
airflow, and a brass block-off plate keeps unfiltered air from entering
the carb through the choke rod hole. HP metering blocks are reinforced
for strength, and are specially designed for optimum fuel atomization.
Fuel slosh/vent baffles provide fuel control during hard acceleration
and braking. Screw-in air bleeds, stainless steel throttle plates, and
power valve blowout protection round out just a short sample of features
on these NASCAR-eligible carburetors.