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[C2] Alternator Date Code Question

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Old Feb 21, 2021 | 04:07 PM
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Default Alternator Date Code Question

I have a 66 Vette Block L72 dated 3-18-66.
I am looking at purchasing a 42 AMP 1100696 alternator.
I have a choice of two (2) that are available.
One is dated 6B11 (1966 Feb 11th)
One is dated 6C29 (1966 March 29th)
The car will never go to be judged by NCRS so perfection is not a worry however I would like the alternator to blend in with the engine date.

Which dated AMP would fall in line with the engine date of 3/18/66.
Go with a month earlier date or a date that is a week and a half later?

Appreciate any and all feed back
The car was built May 29th, 1966


L

Last edited by Bill66; Feb 21, 2021 at 04:07 PM.
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Old Feb 21, 2021 | 04:18 PM
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Alternator date goes with the car and NOT the engine. Based on that I would select the 6C29 date......... NCRS Judging would okay both.

Larry
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Old Feb 21, 2021 | 04:24 PM
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having a block dated two months prior raises a flag for me. But I am with Larry on this. but typically parts liken the alt is dated about one to two weeks before the cars build date. it was a common unit shared among other chevy cars and trucks.
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Old Feb 21, 2021 | 08:49 PM
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Thanks for the info
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Old Feb 21, 2021 | 09:11 PM
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My MARCH 29, 66 car has an L79 block dated C76 (March 7th 66). My alt is dated early March also, I'd have to dig it out for the actual date. You say your car is May and not March?

Last edited by I'll C2 it; Feb 22, 2021 at 04:42 AM.
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Old Feb 21, 2021 | 10:18 PM
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My JE engine build date is C 27 7 (3/27/67) and my 1100696 alternator is dated 7 C 14 (3/14/67).

Last edited by ettev; Feb 21, 2021 at 10:19 PM.
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Old Feb 22, 2021 | 08:14 PM
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I have to believe it would be an epic kick in the nuts to lose some coveted designation over a diode. Glove compartment bulb base composition? Ok. Casting date of the knibbling pin? I get it. But a diode date? That is tough.

Dan
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Old Feb 22, 2021 | 08:23 PM
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Originally Posted by dplotkin
I have to believe it would be an epic kick in the nuts to lose some coveted designation over a diode. Glove compartment bulb base composition? Ok. Casting date of the knibbling pin? I get it. But a diode date? That is tough.

Dan
When John Pirkle was alive and restoring alternators you got the correct dated diodes. Was he pricey, yes, but he was the cream of the crop.
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Old Feb 22, 2021 | 08:32 PM
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Novice here.I do not understand your note...knibbing pin etc .My car is a real nice clean driver which is what I wanted. Bought it to enjoy the road. If I get caught in the rain going to a show I will just keep on driving in it. Unlike trailer queen owners I will not cry. Have no desire to have it checked out by anyone or organization. Just start and go.

My electrical system is fine and works well. I wanted to add some spare parts (jack w/handle, alternator, books/manuals), and small parts/pieces to what I have collected over the years including non Vette 60's cars. The price given to me for the 42 Amp working factory alternators is so low I could not pass them up hence my date question. No rebuilding to be done and do not want any to be done.

Hope this helps.

Bill

Last edited by Bill66; Feb 23, 2021 at 07:36 AM.
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Old Feb 23, 2021 | 10:20 AM
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I have one of his horn relays in my Corvette,

Dan
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Old Feb 23, 2021 | 12:57 PM
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I got my starter and alt. and correctly dated regulator from John Pirkle. That was close to 20 years ago and all are working fine.

Last edited by silver837; Feb 23, 2021 at 12:59 PM.
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