CRANKCASE VENT TUBE -BIG BLOCK 454(Air Cleaner to Valve Cover) Crankcase vent tube, all w/454. Tube runs from R.H. valve cover to air cleaner filter. MakeCHEV ModelCORVETTE Year1973-1974 Item#ACL643/BB Instructions / Core Return FormClick Here Price$19.95EACH Core Charge$0.00 QtyAdd