Cutting the firewall?

I have a 2004 4Runner. Lots of mods. Plan on SAS in the near future. In the meantime I am now running 37"s and need to do some major cutting.

I did the pinch weld pounding many years ago for 35's. Likewise trimmed the body mount and trimmed the fender liners and move the wheels forward as much as possible with an alignment spec.
Last week did the body mount relocation 5" back from the stock position.

Now I have need to cut into the firewall and footwell. Not much. Will cut and then weld in a new piece.

Before I cut I would like to see any pictures from anyone who has done this on their Tacoma, 4Runner, FJC etc.

I've heard people have done it, but have not been able to locate much information other than one Taco which had pictures that were hard to see what was really done.

Appreciate any help.

Cheers
Mark