[ChuckDriver]

Dan,
I removed everything from my firewall except the hinge holes. I also filled the dimmer switch hole, moved it inside the cab, higher up on the floor, using a factory bead in the floor to center it on so the wiring lays in it. The square nuts also can off and I tacked the support from the inside to the firewall.

I also used the elevator bolts to replace the holes that the factory firewall cover was mounted with the push through fasteners.

Don't remember where I saw it but have seen the stock e-brake handle used with a Lokar cable.

You should also reworked the hole for the steering column while you're at it!

Good luck!