I'm not sure exactly what you mean in your above post, PQ, but the 3.4" pulley will produce more boost than the 3.6" (smaller pulley, more boost). The standard maggie kit for a stock car comes with the 3.8" pulley. You have headers (like I do) which produces more air flow. So, to get the same amount of boost through a motor with headers, Magnuson recommended that I get the 3.6" pulley to produce the same boost as the 3.8" pulley makes in a stock motor.
I am also planning to get a cam. I am not planning to change the 3.6" pulley at that time.
Sincerely,
Little Miss Know it All
PS: I only know a little about this because I just went through the same set of decisions and smart people taught me some good stuff!
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