I have a 2000 Chevy Blazer with the 4.3 Vortec/auto. I'm looking at performance modules to improve acceleration. What's a good brand to look for? Ebay has one ad for a "Nitro Module", and it's $25.00. Sounds too cheap to me, but they back it up with a lifetime warranty. I want to turn this Blazer into a show-n-go truck.