I knew this when I bought it, but these are bit of diamond in the rough. It's my bad for not getting the TAC module when I purchased the donor engine.
I'm still not sure if the pedal I have (6 pin connector) was on those V8 models. I just spent an hour and a half calling all the junkyards I could find, looking for a Trailblazer/Envoy/Rainer/Bravada/Ascender with a 5.3...no dice.
They had an aluminum block, so they are snatched up quick.
I called and talked to PSIconversion.com. They were super helpful, and basically told me I need to get the truck pedal. I can get pedal, TAC module, and harness for about $270, all in, from them. They were so helpful, I want to support them. But I'm basically back to where I started, with those pics from ebay, (used for about half the price).
Just thought I would try to tie up this discussion.
Looks my sweet pedal bracket was a waste of time. And the other pedal I bought.
Thanks for your help guys.