AC Delco air filter part #
 

Just bought a RA III Judge and the air filter is filthy. It's orange and has no visible brand or part #. It is 13" (outer diameter) x 2.5".

I want to put an AC Delco filter on the car. It looks like RA applications had a different filter than the non-RA engines? Can anyone advise what the correct part # is for my application?

This seems like such a simple thing, but I cant find the answer with general web searches.

TIA !!

AC Delco A366C.

Thank you so much!!

Apropos part number for a Judge!