I myself have done so much research on this same thing. I will share what I have heard and found. 1 pearson I heard put a adapter he made that screwed on like a hose clamp with a stud, But I never saw pics of it. Many people use the one like in the link ill provid below.

http://cgi.ebay.com/ebaymotors/Chro...tageQ5fCarQ5fTruckQ5fPartsQ5fAccessories

Others will use a factory air cleaner like this.

http://sphotos.ak.fbcdn.net/hphotos...6330584_779265583_12881603_7331044_n.jpg

Or like I did for the time being, Remove the filter from your oil bath and stick in a paper element like this.

http://talk.classicparts.com/picture.php?albumid=180&pictureid=1462

http://talk.classicparts.com/picture.php?albumid=180&pictureid=1465

Here is a link were other folks have rigged stuff to work on there carbs. Just some pics. Form dose not talk to much on filters.

http://www.jalopyjournal.com/forum/showthread.php?t=543375&page=2

Good luck.

1959 Chevy Apache 3100/ 283 TBI / 4L60E

My YouTube:
https://www.youtube.com/mikebtte