Jim and Terry are right. This seems to be something that is not well known as I've seen more than my share of birds with the dual snorkle air cleaners, and this subject has come up many times... and not too many seem to know that the birds had the single air cleaner housing only.

In 67 there were two styles, for most of the country and one for California cars. Then in 68/69 for the most part there was the standard and the 400 assembly with the chrome lid. Then of course the RA set up etc.

Interesting topic Jim... I bet there are quite a few "options" that were like this?

Brett!