DEEC is exactly right. You have to ask your ATO HT. Head of training will decide what you need. However he will probably follow the AMC to part FCL. Being current on the 330 has nothing to do with the renewal of the 320. It is a different type rating and refresher training will be required if your 320 has expired. If it is up to 30 days after the expiration date the HT can decide that LPC is sufficient. After that you need min 2 training sessions according to AMC plus skill test. So basically 3 sessions. You can do it from the left seat even if you are currently on the right side of the 330.