I bought a Classic Bronco and it came with no heater. I wanted to mount a heater for defrost reason but did not like the setup of the current vents. So I decided to design new vents and duct work to help flow the air better.
Heater core I purchased https://amzn.to/2GGUtxf
Hoses I purchased https://amzn.to/3hgYs00
Files https://www.thingiverse.com/thing:459...