Got a Sport Comp boost/vacuum gauge with Roush pod for $70 shipped to anywhere in the lower 48. No problems with it as I put in the SuperSnake gauges in the car and removed this.
I don't think I have the instructions but it's super easy. One hot wire, one ground and the lead to the right side of the supercharger. The hardest part is running the line through the firewall which means I have to crawl under the dash and that's the hard part with a bad back.