Is your car a stick or automatic and what are you going to use as a rear gear ratio? Using the 65 heads you need to convert to screw in rocker arm studs. Good flowing heads,then think about the cam, hydraulic, hydraulic roller, solid. The intake and exhaust are restrictive. How about 67 ram air exhaust manifolds and oversize exhaust. How about sneaking on Edelbrock Performer intake and removing the lettering and painting it Pontiac blue. Larger AFB. If your in the NYC area look up Richie Hoffman or Larry Hansen over in Jersey. 400-450 rwhp should be obtainable.
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