[kh99]

Originally Posted by bzcomputers

Can this be done be inserting a conditional somewhere and adding the forums in question into an array for that conditional?

That should work. If you use a hook like global_init_setup_complete and code like this:

global $forumid, $vbulletin;
if (in_array($forumid, array(1, 2, 3))) // change 1, 2, 3 to your list of forum ids
{
    $vbulletin->options['postmaxchars'] = X; // change X to new char limit
}