Edelbrock/Glidden Competition & Ultra High-Performance Heads Designed in conjunction with Billy Glidden and engineered for competition small block Fords, these hot new cylinder heads are fully CNC ported by Chapman Racing. The unique combination of altered valve locations and the Billy Glidden 56cc combustion chamber design produces maximum power in ultra high performance applications. Exhaust ports are raised .520'' for a straighter exit. Sold without springs or valves. For use on 9.20'' blocks with 9.50'' manifold. 2.15'' intake and 1.56'' exhaust valves are recommended.
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