I have a 1987 K5 Jimmy with a basically stock (160k miles, rebuilt @ 130k no mods stock cam, etc, etc) only has headers and a k&n filter. I want it to make 300 ft/lbs of torque at a useable RPM range. Can it be done? Tell me exactly what I need to do everything from fuel delivery upgrades to engine upgrades. Please be specific. Oh and I'm on a budget.