This. Idk how you plan on using this truck or how much but gas is about to be $5.00 a gallon nationwide. Save the carbs for the old cars that need to be period correct. Considering the poor mileage, additional wear on the engine from fuel washing the cylinders, contaminating oil etc etc I don't see why you would want to go that route. Your year truck can be easily swapped to an L31 with little work or investment. You are going to spend more money and end up reverse engineering everything from the fuel tank to the throttle cable just to make your truck run with a toilet bowl.One thing to consider is an L31 Vortec 350 96-02. 99-02 are in full size vans primarily, because the pickups and SUV's went to LS engines in 99. Vans in 03. Simply replace your PCM with one out of a 96 ONLY 4wd pickup with a 350 or have your existing PCM reprogrammed as a K1500 w/ the 5.7. Wiring would consist of adding 4 wires and moving 5 to different locations on the PCM. That's it and you have sequential direct port injection. Way cleaner and more powerful than an old carbed 350. The fuel lines even bolt up and your pump will work fine. With a carb you'll need to do some fuel system mods on both ends.