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C2 Distributor Differences

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Old Aug 21, 2024 | 05:28 PM
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Default C2 Distributor Differences

I need a Distributor for a 63 Corvette 340 hp engine.
As the block and heads and intake are correct for 63, I would like the Distributor to also be correct.

Is there any above or below the manifold differences between a 63 Distributor Housing and the other C2 or early C3 years?

Thanks

Last edited by INMYOWNBARNSINCE82; Aug 21, 2024 at 05:52 PM. Reason: Improved the question
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Old Aug 21, 2024 | 06:12 PM
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The football shape weights, springs and vacuum advance can differ from different engine variations
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Old Aug 21, 2024 | 08:05 PM
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Once the aluminum band is gone, there is little way to know what a distributor originally came on.
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Old Aug 21, 2024 | 08:30 PM
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Originally Posted by INMYOWNBARNSINCE82

Is there any above or below the manifold differences between a 63 Distributor Housing and the other C2 or early C3 years?

Thanks
As above, springs and weights.
Any SBC or BBC tach drive distributor will work
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Old Aug 21, 2024 | 09:38 PM
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62' 340 hp had the dual point version, That tach is one of the most desired
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Old Aug 21, 2024 | 09:48 PM
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In addition to elements in above posts , it is key to make sure the slot in pole piece that limits mechanical advance is correct.
the underside should be marked with ‘CCW’ and a 3 digit number indicating advance. For my L79 it’s CCW 530 for 30* of mech advance.
for the ‘63 L76 340; mech advance was 24* so the pole piece would be marked something like CCW 524. These are all Internal Differences so I’m not sure how much it would matter to you.

Last edited by kts1962; Aug 21, 2024 at 10:01 PM.
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Old Aug 22, 2024 | 08:31 AM
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The 1963 distributor football on top of the main shaft should be stamped 54 and the rotating weight base cam is stamped CCW 724, weights are stamped 37. The vacuum advance control is stamped 201-15.
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Old Aug 22, 2024 | 08:44 AM
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Originally Posted by GCD1962
62' 340 hp had the dual point version, That tach is one of the most desired
BUUUUUUUUUT, it does not have a vacuum advance, which in my book, makes a car more practical for town and city cruising.
If some just gots to have a 985 distributor, I gots one.
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Old Aug 22, 2024 | 12:03 PM
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Originally Posted by tbarb
The 1963 distributor football on top of the main shaft should be stamped 54 and the rotating weight base cam is stamped CCW 724, weights are stamped 37. The vacuum advance control is stamped 201-15.
Tbarb, you wouldn’t happen to have this information on both 64 distributions would ya?
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Old Aug 22, 2024 | 06:29 PM
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I don't have the exact specs for the 1964 distributors but I will look and see what I can find. If you belong to the NCRS and do a search on their discussion board the info may be there. I know the shp engines used a more suited (faster) curve.
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Old Aug 22, 2024 | 09:54 PM
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This from GM Heritage will have the basics. But not stampings on specific parts…

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