I just put one of those on an '86 model I'm restoring... at least to the point of running anyway. When I bought it, there was no filter at all, nor was there the little cage thing that holds the OEM foam filter. I ordered a beat up one off eBay just for the cage and bracket.
Then my Uni filter came in and I noticed that the cage/bracket doesn't seem to be required for this filter. Oh, well. My spare parts bin is off to a good start.