830 Holley annular-discharge booster carb. # 9381. Good street/ strip car. New kit about 3 years ago. Ran it on the street. Starts good, idles good. no bog. Used it at the strip once, ran within 2 tents and 2 MPH of my regular carb. Did not spend time tuning it. As I remember it has 79 and 87 jets, with plug in rear. Do not remember what power valve is in the front. My street car combo is mild 462 in a 3500 pound GS with a S/P T400 and 4.33 gear, Runs, 7.5 in the 1/8 mile at about 94 MPH. $250.00 plus the shipping.