Thanks gents. I wanted to ask for Rusty's method earlier, but I didn't want to muddy the OP's thread. I'll study up a little more in detail, but the car in question that I'll be testing this on has several other issues that need attention before getting to the power valve.
I apologize if I did that, but I was thinking it was kinda all related so I threw it out there. If it's too far off the beaten path, just ignore it. LOL