Dave,
    The air cleaner you describe sounds like the original OPTIONAL air 
cleaner that was available for +4s in the '60s.  I think they were a 
Purolator oil bath item, but do not recall for sure.  I do know that they are 
quite a rare item!
    Unless you live in an exceptionally dusty region, I don't know how 
important the air cleaner is, as I've had my "unair-cleanered" '64 since '71. 
 In spite of the odo, she has almost 100,000 miles on her and she (knock 
wood) still runs well.
Cheers & Happy Morganing,
    Jim Nichol
    '28 Aero
'64 +4 4 seater
    
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