There was a small metal tag attached to the nut/stud that holds the center in the housing. It is approx 3/4 x 3 and has id #'s and codes stamped on it.
65 FB "J" 302 lots of mods. 94 GT K&N only.
http://albums.photopoint.com/j/view?u=1590489&a=12113030&p=43871256.jpg
65 FB "J" 302 lots of mods. 94 GT K&N only.
http://albums.photopoint.com/j/view?u=1590489&a=12113030&p=43871256.jpg