*UPDATE* Now puts 307 HP and 447 FT-LBS down at the wheels and gets 13-14 MPG after dyno tuning at Hitech Motorsport in Elk River, MN. Have a Dyno chart to show.
1997 K2500 Suburban 149k miles with over $8k in upgrades over the course of its life.
Whipple-charged 454 producing house moving...