Well, its been too many weeks since the last update. I will attempt to catch up. Quite a bit of progress.
First up is the Drive-By-Wire throttle pedal. My LS3 came with a drive-by-wire throttle body. I had a choice of keeping it and using a drive-by-wire pedal or swapping out the TB.
After much internal debate, I elected to keep the TB and use a drive-by-wire pedal and a computer that would support them.
Once that decision was made then came "how do I mount this thing??". Luckily a couple other guys had been down this road. I pirated their ideas with some modifications.

The Holley Terminator X Max computer requires a GM pedal, part #10379038, originally intended for many Cadillac models.


I fab'ed the bracket from a piece of aluminum, cut some clearance for the connector latch, and made a couple of mounting details.


There is a lot going on in this very crowded area.