This setup was intended for cars that have a sheet metal dash.
The mounting plate in the photo above will butt up against the vertical sheet metal mounts that hold up the pedal box. It has 3 M8 X 1.25 threaded holes that will require through holes to be drilled on the pedal box. 2 horizontal holes for the ears on either side of the mount plate and 1 vertical under the u shaped cutout at the bottom. You can see the boss to the right of the MC mount profile.
This kit will look just like this

I am still exploring where best to place mounting holes for the MC mount plate.
Would the dash fit with one of these?
Looking at the pedal box and having remote brake fluid reservoirs. The BMC can be located behind the factory dash