· Premium Member
Well, a stock intake and 4bbl will add about 25hp, but you can verify that through the factory differences in a book, or even an internet search. When it comes time to do the swap, save the money up, get all the parts like cam and lifters, dual exhaust system, headers can add about 15hp but you would not use it enough to make the cost worth it on the street really, dual exhaust will work just as well plus save a ton of money and headaches, and do the work all at once so you only need one gasket set. It may take a little longer, but talk about more enjoyable when done. Oh, and the truck cam in the engine now probably is set up for low end torque more than top end power, so it should at this point in time do decent on mileage.