Something is draining the battery on my 69 camaro. Where is a good place to start looking? Thanks in advance

 

Connect an ammeter between a battery terminal and the battery cable. Start pulling fuses one at a time till you find the one causing the draw, then see what that fuse is powering. Also check glove box lamp & make sure it goes out when closed.

 

That's if he's small enough to fit inside the glove box.
A bad diode inside the alternator can cause a drain too. If the fuse hunt doesn't turn up anything, try disconnecting the alternator and see if the battery still drains as it's doing now.