Normal
set the timing back down. Ur car is carburetor rite? Look at the carubetor below the air filter, there is one arm with a screw. That arm would move when u activate the air con and the screw would press on the timing lever on the carubetor. To find this arm, turn the air con on and off. Once u find this arm, turn the screw to play around the idle timing when the air con is activated.