The holes were from the rust
I seriously think that you have a 1994 Bonneville SLE. I think they switch over in May.
The firewall was fine, the brakes were practically non existant due to leaky lines and wheel cylinders. I replaced the master cylinder and noticed that all the lines comming in were seeping. Time to get rid of it
I bought it for $50.00 and sold it two years later for $50.00.
New master cylinder: $63.00
New coil: $54.00
New brake lines: $30.00
Rusted out body: Worthless