souping up 4.3 astro ecenomically

will a tornado devise in my intake enhance my mpgs and performance, and are there other tricks not too expencive for my4.3?

the tornado will not work, i promise. you can do little stuff like get a cold air intake, pulleys, or ignition system that will increase your mpgs without making your van sound like a racecar while 'souping it up'

Although "Tornado"s work in many vehicles, Vortec engines do not see much (if any) difference.