Welcome to CHR. Adding 70 plus HP to your bone stock 350 is a pretty big step to do on the cheap. As a "C" it's 2WD, so like Mike says, give some ideas as to how you plan to use the truck, what tranny you're running, the rear gears & tire size now and most important your budget for upgrades and guys will start throwing ideas at you. Also, what's the mileage on the truck, and do you know the history of the engine relative to rework (wondering if you have a good base for a 40% power increase).