See through carb bowl??

Rainy Day Auto said

So I found a pic of something that caught my attention.

It appears to be a see through carburetor bowl on a one barrel.

Where was such a thing available through??

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came stock on many 1904 carbs 1958-1960-62 ish
the large script HOLLEY are very hard to find
they crack if over tightened
you can find them on ebay ect
but the metal strap and screws and clamps are the had part to find