3-1/2″ tall chrome Y-Top wing nut to fit Chevy, Ford, or Mopar engines. Thread size: 1/4″-20 x 1″ studs.
Compatible engine blocks: 1955-86 Chevy Big Block/Small Block. 1959-90 Chrysler V8 (Except Hemi). 1964-90 Ford 260-289-302-351W Small Block. 1985-UP Ford 429-460 Big Block. 1958-79 Oldsmobile V8.