68-69 B body info needed...

The fender tag will have an "order number" which should match the number stamped into the radiator support and trunk rail.
It's the same as A bodies.

I am a 68, 69, and 70 b body owner as well so no issues with you asking here :)
Love the B-bodies, especially '68-70's. I've ran around a ton in B-bodies in my younger days. As to J par, you answered his number question. Coronets, Chargers, GTX, Satellites, Belvedere's..... ran around in 'em all when I was much younger :)