Here are some threads I found about the Powermaster..some good some bad..
Thread 1
Thread 2
Thread 3
Thread 4
Thread 5
There is someone on this site that goes by Hozer 88GTConv
Maybe you can email him with any questions you might have...Just a few threads to read on...there are many more on here and Corral and Stangnet...do a few searches and see what you decide man...laters-Milt