Unregistered users may browse the website, but in order to participate in the forums and view select pages (such as "Club Contacts" and "Classified Ads") a user account is required. Click HERE to email the webmaster and request a free account. The National DeSoto Club uses real names rather than pseudonyms. Notify the webmaster of your user name preference (Johnathon Doe vs. John Doe, etc.), preferred email address, and password request.
You might try reaching out to Les Pesavento, the model year coordinator, to see if he can provide any input to those codes. I would also reach out to the club librarian, Geoff Overley, to see if he has any documentation (such as a data book for instance) for your car that can help.
Les Pesavento: lesterpes@gmail.com
Geoff Overley: DeSotoadventures@gmail.com