Description: This cast iron Vortec cylinder head will fit 1958 and later small block Chevy engines and offers a 20 to 40 HP increase over earlier cast iron small block heads. Features include 64cc fast burn combustion chambers 170cc intake runners and a high-velocity LT1 port design. It requires the use of a Vortec-style intake and self-aligning rocker arms will accommodate(more)

Description: This cast iron Vortec cylinder head will fit 1958 and later small block Chevy engines and offers a 20 to 40 HP increase over earlier cast iron small block heads. Features include 64cc fast burn combustion chambers 170cc intake runners and a high-velocity LT1 port design. It requires the use of a Vortec-style intake and self-aligning rocker arms will accommodate up to a .475 in. lift cam and comes complete with 1.94 in. intake/1.50 in. exhaust valves springs retainers and 3/8 in. pressed-in studs.(minimize)