Related Photo Galleries
We used the package approach (components designed for the utmost in compatibility and function) for our intake manifold and cylinder head swap. The Edelbrock Performer RPM heads (PN 60739) and RPM Air-Gap intake are meant to complement one another. The complete heads feature 70cc combustion chambers, 170cc/60cc intake and exhaust port volumes, and 2.02/1.60 valves. On the flip side, the Performers employ a 1.45-inch valve spring diameter, 3/8-inch rocker studs, and a 0.575-inch diameter pushrod.