[ERA Chas]

Originally Posted by CobraEd

Any of you have any first hand experience? Here are two.

http://www.jomarperformance.com/powercone.php

http://www.highvelocityheads.com/ss.htm


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You need all the info. As a general rule these work best (12-18HP on Fords) if you have:
Heads that flow 300 or more on the intake, displacements of 427 or more, single plane intakes and intake valves of 2.08" or bigger. A cam with .600"+ lift helps too.

Of course on most Cobras they're impossible to fit the hood height anyway...