It depends on what you are going to spend on the Q-Jet and how much to rebuild - I don't think $400-500 for carb and correct rebuild is too much if it is correct for your application. The stock Ram Air III intake with Q-Jet is a good combination.
My 400 hoods are original so I can't address that part, but I know some of the other guys can. I recommend the metal hood scoops. I would purchase your scoops from your hood vendor as a set.
