I think the only BBF I've owned was my F250 Camper Special, waaaay back when.
It used the same filter, huh? Ok then...
I bought a number of the double fluted filters when I heard about this last year.
Bob -- when you say "the top of the filter" are you referring to the closed end? Is it just the AUTOLITE in caps or does it have a border? Color of the lettering? Approximate size?