Not a direct bolt in. The firewalls are different. The dash controls, wiring, bezel, etc. It's all different. Might be better to leave your A/C box in and keep your wiring and controls all factory. Just plug the A/C fittings off at the firewall.
This is exactly what I did with my 69 Dart. It was much easier to just bolt the original AC/Heater box back in the car. I just capped off the AC vents under the dash and removed all the components that come through into the engine bay. Heater portion still works using factory control setup.
