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Ford Junkie
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Only problem I had with Twisted Wedge heads (circa '97 castings) was that the height of the valve cover deck surface was higher than stock heads and other aftermarket heads which pushed the valve covers up against the upper intake (94-95 style Cobra) which resulted in the need for a 1/2" phenolic spacer between the upper and lower intake. No valve cover sealing issues whatsoever and no ridge.
 
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