Factory A/C in 1967-1972 Darts

My factory air in my 69 Cuda works great. It will freeze you out. I did the non ac to ac conversion myself using a system salvaged from a 71 dart. Rebuilt the heater box with a kit from Detroit Muscle. Used the original factory hoses. I bought a new condenser, drier & expansion valve off the internet. Vacuumed it overnight. Charged with R134.