Join the Pre-War Division of the Buick Club of America
First, you have to be a member of the Buick Club of America. If you are not one and want to join, see here.
Once you are a BCA member, the best way to be listed as a Pre-War Division (PWD) member is through the Buick Pre-War Forum on the AACA Forums.
Sign up to be a Forum member by going to forums.aaca.org and clicking on the Sign Up button in the upper right corner.
Once you are registered, search for Brian Heil on the Messaging function and send him a Private Message (PM) with your details!
And, don't forget to go to the Buick Pre-War Forum to find out what is happening!