Not Ranked
I will agree with Jim.
If you know what cam is in the engine, add up the total over lap when adding both the intake and exhaust together.
A good rule used for a performance cam choice in a 350 for the street is 50 to 70. 70 equalling at the ratical, unstreetable edge
Unless you have say 65 or higher or the need for higher performance in the 5k + rpm range I would stay with a dual plane. Most people experiance better drive ability and crisper throttle response with a dual plane.
Sorry, can't answer your question about your intake. I would suggest you contact Holley Tech Services and ask for any Old Fart. I am assuming that intake may have some years on it, but i am not sure.
Bud
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