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Distributor Casting numbers

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Old Oct 18, 2025 | 07:17 PM
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Default Distributor Casting numbers

I have a couple of distributors that are missing their bands, so all I have is the casting numbers. They appear to be 3 digits, can anyone tell me how to decode them?
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Old Oct 18, 2025 | 08:57 PM
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From what I understand, the distributors were only identifiable by the aluminum bands. The primary housing design change was the drilled hole at the end of the tach drive gear pocket, according to the '70-'72 judging guide, appearing in mid-70, but my '67 guide says it appeared in '68. 🤷🏻‍♂️

What casting numbers do you have?
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Old Oct 18, 2025 | 09:40 PM
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Yes, I think it was around 71 the hole for the bushing button began to appear on tach drive Delco Remys. If the VAC is known to be original - that might be a clue.
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Old Oct 19, 2025 | 08:59 AM
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The Corvette forum has this pdf posted:

https://www.corvetteforum.com/forums...352d1386500596
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Old Nov 2, 2025 | 05:59 PM
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Originally Posted by barkingrats
From what I understand, the distributors were only identifiable by the aluminum bands. The primary housing design change was the drilled hole at the end of the tach drive gear pocket, according to the '70-'72 judging guide, appearing in mid-70, but my '67 guide says it appeared in '68. 🤷🏻‍♂️

What casting numbers do you have?
One is from a 72 LT-1 - I believe the casting is 681
The other is probably from a 69-70, casting is 190 pic attached


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