Quadrajet 4 barrel carburetor with a part number of 7042220, a date of J1 and a trans code of EM for 1972 Chevy model cars with a 402 or 454 big block. All linkages are free, idle mixture screws turn. Fuel inlet threads look good. Missing a few pieces such as the choke linkage and the accelerator pump and related linkage as seen in the pics. Also missing some top cover screws and some other minor linkage pieces. Good core for parts or a starting base for a rebuilder.