There a new 440 6 manifold in the parts section on Moparts, pretty good price, Summit Racing probally has the best carb prices, I'd recommend the 340 Carbs on your 440 set-up, larger air bleeds, same CFM as the 440 carbs, better price also, air cleaner from Mancini Racing or Summit, shop around, sometimes the one stop shop isn't the best deal, linkage can be had from SummitRacing, only air filter elements available right now are the K&N's...