Mounting Vintage Air Unit Higher Under Dash......

[roll_the_dice]

I just installed mine recently. I am not a huge fan of how it hangs down in the cab, but I didn't want to mess with the firewall to have the opening differently or to reroute the plumbing to come out differently.

Probably could come up 1 1/2" to 2"....or you could do a builders series A/C and make it even a smaller footprint. This is my Gen IV installed under the dash.