392 Nostalgia Billet Cylinder Heads. 5/16″ Intake valve guides x 11/32″ Exhaust valve guides, .051″ x 4.400″ OD Jr Hoops. 6 Bolt intake manifold stud pattern. (pair)

Muscle Head Stage V: Program V2-P8-F12, 2.490″ x 2.020″ valve dia, 104cc chambers. Std Copper intake valve seats, B5 Exhaust valve seats, .025″ Jr Hoops & All 9/16″ Head stud inserts. 2.600″ lifter spread, 12ø Exhaust Flange. (pair)