I have a 1966 oldsmobile 330 engine with air conditioning. All my pulleys line up except air compressor pulley. If i have to replace all of the pulleys i will.But if could get some assistance it would be greatly appreciated. Thanks!

 

All of the pulleys lined up when the car left the factory, so before spending money on replacing all the pulleys, you might want to figure out what has changed since then. A photo or five might help us see what's wrong.