Memories. 25 years ago I had a gal who came in complaining about a very hot draft thru the firewall on her foot. Couldn't wear sandals. Boo hoo. I thought she was just being a girl.
I looked up under the dash and there was a 1" hole above the gas pedal that I did not recognize as being factory. Curiosity got the best of me and I took off my glasses so I could get my head right up against the brake pedal for a better look. Looked thru the hole and started laughing!
The hole was PERFECTLY lined up to provide access to the last bolt in the exhaust manifold!
I put a fender washer on both sides and a bolt to hold them in place and told her to buy me a burger! LOL
Disclaimer: I can't say I'm completely above this. Pre-Mark's Off Road, I hacked a hole in the firewall of my '68 trail rig to get to the rear freeze plug on the head. Screwed a plate over it when I was done. I've never gotten around to fixing it.