I would love to do this on a more modern-ish car, but watching a Rich Rebuilds video on retrofits, this probably is only feasible on older cars because you don'

I would love to do this on a more modern-ish car, but watching a Rich Rebuilds video on retrofits, this probably is only feasible on older cars because you don't have to interface with any of the electronics in the car, or have HVAC.