Was there a unique OEM wing nut that held the top of the 1 barrel AD truck pancake air cleaner to the base? I currently am using a common/modern wing nut. Can you share a photo or two? Is there a GM part # for it? Is there a source for a look alike replacement? I would like to put an original back into service on my '48 Chevy 1/2 ton truck. Thanks.

LUKE