I just replaced both the right and left floor courtesy lamps. I used a #63 bulb (69 Bird). This seems really bright. Is this the right number replacement ?

P.S. I had no brake lights and had a short on the brake light A+ side of the switch,which kept blowing fuses. Found the passenger side floor courtesy lamp center contact shorted to the case of the bulb. This was before I replaced the lamps. 30 sec fix, but it took me 2 days to find it. Many thanks to this site and others. I found a wiring diagram which helped immensely

I found a listing for a Sylvania bulb #631.....I dont know the cross reference for that bulb to other manucfactureres but sounds like it might be the same thing as your #63 bulb.

Heres a pretty cool link....all sylvania bulb part #s listed as replacements for a 69 Firebird.

http://www.sylvania.com/ConsumerProducts/AutomotiveLighting/LampReplacementGuide/AutoLRG-Results.htm

Thanks that is the information I was looking for and more! I will print the list from the sylvania page and add it to the growing file of info on the 69 Bird

Here's an application chart from the Ames catalog.

Might have to save to your desktop and blow it up.