Any Interest in an AC Delete Plate

I’m not understanding exactly what the proposed product is.
If you mean to describe a metal section to apply to a firewall to cover all the holes that are originally for an A/C equipped car, that is a good idea.
Last year I did a Vintage Air system in a 68 Satellite and in their kit, they supplied a firewall plate that did just that. I don’t know what they offer for the A body cars though.
If this is that, I think there may be a market for it. Not enough to get rich but you’d probably do okay and help out some people.
Good luck.