68 69 70 Corvette Camaro Chevelle Nova BB Air Cleaner 427 454 GM factory original Chevrolet big block 427 454 open element Hi Po air cleaner filter breather assembly. This is a drop base for hood clearance will fit Holley, Rochester Quadra jet 4-barrel carburetor was also seen on high performance small block LT1 350 and Z28 Camaro. Come with crankcase vent hose mark GM In white lettering air cleaner to RH valve cover. On the bottom side of lid, it has GM black printing for service information the top side lid is rusty see picture for condition. Originally from a 1968 Corvette 427 motor. $150.