heads, how much hp gain??
looking in the new Summit cataloge, they advertise GT40 heads, complete for $538.00. sounds cheap enuff...
185 cfm flow, 1.84 intake, 1.46 exhaust..
I know, way better than the current 86 heads..
what can i expect in the way of performance increases??
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91 LX 'work in progress'
previous stangs;
lightly modded 84GT
81 2.3 converted to 302 auto
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