3-1/2" tall chrome Y-Top wing nut with a 2-piece design fit Pontiac & Ford engines. Thread size: 5/16"-18 x 1" studs.
Compatible engine blocks:
1958-UP Ford 332-352, 390-406-427-429-460.
1955-77 Pontiac.
Compatible engine blocks:
1958-UP Ford 332-352, 390-406-427-429-460.
1955-77 Pontiac.