Back in 1997 iI bought a 95 GrandAm that was hit in the front, needed a new radiator and AC condenser, changed them out ,put in a few cans of 134 , didn't even pump the system down. Air was cold and never had a problem,. Put over 100,000 miles on that car and the air still was cold.

it's ok to butt heads, just don't do it with a butthead