from what edelbrock says in their manual, they say do not modify the exhaust openings, i doubt you will gain any measureable power from matching them to your ram air ports.
now for max power porting, i cant say what the big porters do, i think ive read SD does do something to the ex ports, but thats beyond what the average guy can do in his garage. i'd say leave them alone unless you know what youre doing.
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