Need help on a few things about my engine. What's the difference in my engine vs the 5.3's in the 1500, Tahoe, Avalanche, vs the Hummer H3, and Colorado? I'm working on getting my Heads ported by Lingenfelter, or just purchasing castings from Texas speed. I'm also wanting to put a Magnuson supercharger on it. I read a forum where someone put a Magnuson for the Colorado and adapted it over, and I think they had to use a Colorado Map Sensor or something. The reason they did that is that the Alpha version has been discontinued.