World Products 014250 - Cylinder Head Cast Iron Chevy Small Block MOTOWN 220cc 64cc 23Degree 2.080" x 1.600" Straight Plug, Bare CastingsWorld Products 014250 Cylinder Head Cast Iron Chevy Small Block MOTOWN 220cc 64cc 23Degree 2. 080" x 1. 600" Straight Plug, Bare Castings Designed for use in racing applications where cast iron Head are mandated or for larger displacement small block street type engines, Worlds 220cc intake Motown Head are the Ultimate cast iron SBC head. Employing big 2. 080 diameter intake valves and a highly efficient combustion chamber, the Motown head provides