BIG BLOCK CHEVY CHROME HEX HEAD OIL PAN BOLT KIT THIS KIT INCLUDES (24) 5/16"-18 X 1/2" AND (4) 1/4"-20 X 1/2" BOLTS AND WASHERS FOR 1965-1990 GEN.4 BIG BLOCK CHEVY 396, 427, 454 AND 502 OIL PAN