RE: make my truck run better and faster
Like vetteguy said, the cold air intake and also some flowmasters or magnaflow exhaust.
also try putting some weight over your rear axle, that way you get more traction off the line. (traction is a big problem for me cause i drive a stepside single cab 350 v8 and the rear end is extremely light)
White 1997 Single-Cab Stepside 5.7 Liter 350c.i. V8