98SilveradoK1500

My buddy had a 97 Chevy Malibu, he thought something was bad with tranny because it wouldn't drive forward. I took a look at it and turns out that the left wheel caliper bolt fell out somehow and the caliper was rubbing on the rim. So i basically got a free car. When i sell it i am planning on rebuilding my motor. I have a 98 Silverado 350 Vortec. Any Suggestions on Cheap Parts? What Kinda Parts I should put in it for street performance that is closer to stock than drag vehicles(i already have a built up 4L60). Any suggestions would be helpful. Thanks!