Oh, well you can attempt that, but I do not know if KNtoran will approve it, I think he wants to work with the standard 3.5 rule set / manuals. He can better tell you when he Replies here (tomorrow).
With that said, you are on the right Board. The Member Wars Board allows you to start anything you want. I recommend starting a new Thread within this Board and detail the new Class. You can label the Thread "AD&D [your class name] Class" and then ask KNtoran to look at it and see if he approves it for his AD&D scenario here.
Thomaslee. I have looked at what your are proposing and If you want to play a bard I will accept that. I am not wanting to create a new class right now. I will look more at the inkheart character to see if that is something I would eventually allow in the play by post area.
You will have to keep track of your stats like I will be doing. I will inform you of your experience gained after the party returns to the village. If you go up in a level you will be instructed on what to do then.