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Distributor Help Please!!???!!

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Old Oct 31, 2004 | 05:19 PM
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Default Distributor Help Please!!???!!

Hey guys I was looking for a replacement distributor for my 76 L48. I found one on the net for $129. However when I talked to the guy he said I need the mechnical tech drive type which is $399. Now I have an HEI setup and my tech runs off of one wire off the distributor and the one I found for $129 is also HEI. Will this not work?? I really didn't want to spend $400 for a distributor. Anyways please ASAP as I would like to get this going. Oh by the way I am also changing the timing gear set and chain is single roller ok.

Thanks
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Old Oct 31, 2004 | 05:31 PM
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In '75 corvette and most other GM vehicle went to the HEI set-up. You do however need the early HEI distributor with the advance wieghts and vacuum advance. I'm not sure when they stopped using these but the later units used a computer controled spark advance so They won't work
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Old Oct 31, 2004 | 05:33 PM
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well ok the one I ssaw on the net has vacuum advance so will that work?? And exactlly what is mechnical tach drive??

Thanks
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Old Oct 31, 2004 | 05:40 PM
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the mechanical tachometers ended at the end of the 1974 model run. 1975 and newer had electronic tach that no longer used the "mechanical drive".
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Old Oct 31, 2004 | 06:02 PM
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Your car should not have a tach drive distributor. This is an aftermarket tach drive dist. The tach drive is below the cap on the body.



Your car should have a HEI type distributor.

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Old Oct 31, 2004 | 06:06 PM
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yes mine is the bottom one of the two pictures. Thanks guys for your quick help

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Old Oct 31, 2004 | 06:19 PM
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This is a mechanical tach drive distributor I have in my basement. You will note the threaded stud for the tach cable attachment. That was long gone by 1976, replaced by an electronic link. Someone gave you some bad advice.

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Old Oct 31, 2004 | 09:20 PM
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did you think about getting yours rebuilt??? why do you think its not repairable?
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Old Oct 31, 2004 | 09:36 PM
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You should be able to get a basic HEI dist from any auto parts store for less than $100. I think I paid like $79 for mine (had to get a new one when the advance weights pin broke).

Added a recurve kit and new vac can per Lar's recommendation later but HEI's are not that expensive (especially for a stock engine).
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Old Oct 31, 2004 | 09:41 PM
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$116.99 at Autozone. Probably about the same at Schucks or NAPA. OK, $124 at NAPA. (EDIT) And you can always return it if there is a problem (limited lifetime warranty).

Nothing special about the basic L-48 HEI. You can always add a recurve kit or custom vacuum can later per Lar's tuning paper (at www.corvettefaq.com).

Last edited by SteveG75; Oct 31, 2004 at 09:48 PM.
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