I BOUGHT THIS HOLLEY 750 CFM 4 BARREL CARB . DOUBLE PUMP PART # 12R-10552B FROM AN ESTATE SALE OVER SUMMER , ALL I WAS TOLD WAS IT IS READY TO BE USED, BUT SINCE I DON'T KNOW HISTORY I CANNOT GUARANTEE THAT AND IS BEING SOLD AS FOUND, ALL EXTERIOR PARTS MOVE AS SHOULD AND IT LOOKS REALLY CLEAN.