Here is a link to a document that has a lot of great information on air cleaners.
http://www.secondstrike.com/Technica...leanerHelp.pdf
At the risk of feeding his ego, I will give credit to Patrick for sending this to me in another thread. You will see it has a part number and photo of the 14" Ford air cleaner. I'm not sure if this is the reproduction talked about in the previous post, but it is worth a look. The document also has a chart showing flow rates for this filter with 4 different filter elements.
Regards,
Kevin