Remove air conditioning

[yad]

I searched, but couldn't find an answer, mostly because people abbreviate Air Conditioning many ways.

My truck has AC, but I have no use for it. I'd rather just have hot air come out the vents in the winter. Summer is made for cruising with the windows down!!

Can I remove that hideous black shell on the firewall, and replace it with a heater only box? I no longer have the compressor and don't feel like messing with AC at all. If someone has any ideas, I'd appreciate it. Thanks!