INTAKE MANIFOLD BOLT KIT -BIG BLOCKwith "A: headmarks Intake manifold attaching bolt kit, "A" headmark, 3/8-16x1 1/4", Grade 5,w/flanged head , includes 16 bolts. MakeCHEV ModelCORVETTE Year1965-1974 Item#ENG354 Instructions / Core Return FormClick Here Price$20.00SET Core Charge$0.00 QtyAdd