Accelerator Mounting Idea

I asked around for ideas at work this week and came away at the end of the week with one of our "Nutsert" tools (on loan only).

The plan is to drill two holes in the firewall where I can't get at the other side and use these blind-insertable nuts. I played around with an M4 version and it's pretty solid once it's in.
Before insertion.

"Other" side.

Front (insert) side.

I will have to figure out a way to get a slight angle on them as the pedal mount wants to be angled down a bit.