Here's a question for the folks... Did the Pontiac have a light on the ignition switch that came on with the dash lights?
My 65 had it. so I'm assuming the 66 did as well. But you really couldn't see any light coming out at all.
'64 Pontiacs have a lighted ignition switch as seen in the following pictures from Ebay.
--Pritch--
'76 Cougar XR7 (original owner); '52 Mercury Monterey 2 dr HT (Future Project)
2013 Mustang
2010 Ford Ranger
'93 MX5
'64 Custom Sport Ragtop (Factory M20)