Your combination isn't right as is and you are going in the wrong direction with what you think will help. I get the impression that you are already set in what you think will work for you, because of whatever reason. But, well, I'll give you a little bit of advice anyway.
An f cam on a stock SD motor with an intake is about as far off of a good combination as you can get. You will make more power than stock, yes, but it will never run right, and you'll never see the full potential that the parts are capable of.