DAPA Dallas Area Pontiac Association is a great organization (or at least was 4 years ago when I lived in Dallas). Floyd Hand (Jim Hand's brother) is a member, and Floyd often visited with great info, along with the guys from Ram Air Restorations. There is an unbelievable wealth of knowledge with those guys and they are always willing to lend a hand and part. They are based mainly in Richardson/Plano area and used to hold their meetings down at the the BBQ place off of 75 in Richardson just North of Smokey Bones on the Northbound side.
They used to have an annual show and Drag where Jim Butler, RARE, Jim Hand, and many other Pontiac organizations would come out. The Show was on Saturday in Richardson off of 75, and the Drag was South (can't remember the name of the track) on Sunday.