Originally Posted by Marc.
I don't know......
my '55 GMC came with "Factory Air". grin

http://s1237.photobucket.com/user/55GMC/media/DSCF0152.jpg.html?sort=2&o=0
yahoo Excellent Point yahoo
Although the Factory Air only remained in the tires, everything else is automatically replaced during the trip from the factory to the dealer. big_eek