What kind of power and sound do you think I would get out of this set up? Hooker Competition Headers, 2 aero chamber mufflers, tips and straight pipes all the way back, im looking to run 3" duals all the way back, no emissions.

If you plan on running this on the L03 you have then its way over kill. You will actually lose power, and seeing how you have a L03 you dont have much to spare if you know what I mean. Get some shorty's and a 3" cat back and youll be set. Even if you drop a mild 350 in that set up will be fine. Your not making enormous amounts of power so you dont really need 3" duals and longtubes. If you absolutely insist on running duals run 2 1/4 duals. Even that is over kill for a 305. But I would just get some shortys and a 3" cat back if I were you.