Author Topic: March 1968 390. Correct vacuum advance unit?  (Read 1468 times)

Offline mungus

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March 1968 390. Correct vacuum advance unit?
« on: July 05, 2020, 06:27:07 AM »
My 68'390 GT FB arrived with a dual vacuum advance unit. I had that restored and having found good units hard to come by, I have since found and restored others as spares.

However I recently read on another forum, that the dual advance units were only used from late 1968 onwards...  :(
My understanding was that the correct distributor for a 68' GT390 C6 car is a C80F-D and for the 4 speed, the C (single)?
So is true for all 68' 390 cars, or is there a date where things changed?

Thanks in advance. 
« Last Edit: July 05, 2020, 07:07:57 AM by mungus »
March 14th 1968 - Metuchen S code Fastback
C6 auto, LS 3.25 diff, Gulfstream Aqua, Black Vinyl, Headrests, Console, GT group, PS, PB, AM/FM stereo, F70 tires, tinted glass, louvered hood.

Offline ruppstang

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Re: March 1968 390. Correct vacuum advance unit?
« Reply #1 on: July 05, 2020, 09:01:05 AM »
Your carb numbers are correct. Both used a duel vacuum advance all year as far as I know.

Offline CT428CJ

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Re: March 1968 390. Correct vacuum advance unit?
« Reply #2 on: July 05, 2020, 09:18:05 AM »
Quote
68' GT390 C6 car is a C80F-D and for the 4 speed, the C (single)?

The -D was on both.

The -C is a small block distributor.

Offline ruppstang

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Re: March 1968 390. Correct vacuum advance unit?
« Reply #3 on: July 05, 2020, 02:54:16 PM »
The -D was on both.

The -C is a small block distributor.

Yes you are correct, I went down the carburetor column. But that distributor does use a dual advance.
« Last Edit: July 05, 2020, 08:09:25 PM by ruppstang »

Offline jwc66k

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Re: March 1968 390. Correct vacuum advance unit?
« Reply #4 on: July 05, 2020, 04:23:04 PM »
But that distributor does use a duel advance.
Marty, Marty, Marty,
It's "dual". That means two. A duel is a fight. A dual duel is two fights. We get that a lot (it's two words).
(Think of the poor guys in foreign countries like Australia, that don't speak good English. It's your choice if you're communicating in their language over there. They're sensitive.)
English grammar police out.
I promise to be politically correct in all my posts to keep the BBBB from vociferating.

Offline 1967FEGT

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Re: March 1968 390. Correct vacuum advance unit?
« Reply #5 on: July 05, 2020, 05:22:16 PM »
Marty, Marty, Marty,
It's "dual". That means two. A duel is a fight. A dual duel is two fights. We get that a lot (it's two words).
(Think of the poor guys in foreign countries like Australia, that don't speak good English. It's your choice if you're communicating in their language over there. They're sensitive.)
English grammar police out.

How about the use of ALLOT Vs. A lot or Then Vs. Than..   :D :D :D :D :D

Offline ruppstang

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Re: March 1968 390. Correct vacuum advance unit?
« Reply #6 on: July 05, 2020, 08:07:10 PM »
Marty, Marty, Marty,
It's "dual". That means two. A duel is a fight. A dual duel is two fights. We get that a lot (it's two words).
(Think of the poor guys in foreign countries like Australia, that don't speak good English. It's your choice if you're communicating in their language over there. They're sensitive.)
English grammar police out.

Think of the guys here that do not spell well and some times get in a hurry to post a answer to help some one. We are lucky to have guys that have all day to keep us in line.

Boy I hope I spelled that all correctly. ;)

Offline 1967FEGT

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Re: March 1968 390. Correct vacuum advance unit?
« Reply #7 on: July 05, 2020, 08:57:10 PM »
Sorry. It was meant to be funny.  It was.  ;D

Offline jwc66k

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Re: March 1968 390. Correct vacuum advance unit?
« Reply #8 on: July 06, 2020, 12:16:22 AM »
Think of the guys here that do not spell well and some times get in a hurry to post a answer to help some one.
Sorry. It was meant to be funny.  It was.  ;D
You actually hit the nail on the head. If you post an answer and it's not easily understood, it can cause problems. Bottom line is - read what you post.
And s m i l e  ;)
Jim
I promise to be politically correct in all my posts to keep the BBBB from vociferating.

Online krelboyne

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Offline mungus

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Re: March 1968 390. Correct vacuum advance unit?
« Reply #10 on: March 22, 2021, 08:27:26 PM »
Marty, Marty, Marty,
It's "dual". That means two. A duel is a fight. A dual duel is two fights. We get that a lot (it's two words).
(Think of the poor guys in foreign countries like Australia, that don't speak good English. It's your choice if you're communicating in their language over there. They're sensitive.)
English grammar police out.

Ha! An American commenting on what is "good English". You guys can't even spell correctly. :-)
March 14th 1968 - Metuchen S code Fastback
C6 auto, LS 3.25 diff, Gulfstream Aqua, Black Vinyl, Headrests, Console, GT group, PS, PB, AM/FM stereo, F70 tires, tinted glass, louvered hood.

Offline jwc66k

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Re: March 1968 390. Correct vacuum advance unit?
« Reply #11 on: March 23, 2021, 12:21:31 AM »
Put another shrimp on the barbie and have a beer. We'll get around to correcting your inserting an extra "u" in some words one of these days.
Jim
I promise to be politically correct in all my posts to keep the BBBB from vociferating.

Offline Bossbill

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Re: March 1968 390. Correct vacuum advance unit?
« Reply #12 on: March 23, 2021, 01:32:42 PM »
Note the Ford TSB footnote says "headlites".

That is "more" better.

As an aside it should be noted that the Carburetor number and Distributor partial part number are both "C80F-D". And yes, I spelled out both Carb[sic] and Dizzy[sic].
« Last Edit: March 23, 2021, 01:35:34 PM by Bossbill »
Bill
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Offline 67gtasanjose

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Re: March 1968 390. Correct vacuum advance unit?
« Reply #13 on: March 23, 2021, 04:22:21 PM »
Think of the guys here that do not spell well and some times get in a hurry to post a answer to help some one. We are lucky to have guys that have all day to keep us in line.

Boy I hope I spelled that all correctly. ;)

*REPORTED

...and Jim, Marty is from Nebraska. He does the best he can, being corn-fed and all.
« Last Edit: March 23, 2021, 04:26:19 PM by 67gtasanjose »
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Offline jwc66k

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Re: March 1968 390. Correct vacuum advance unit?
« Reply #14 on: March 23, 2021, 07:26:06 PM »
Marty is from Nebraska. He does the best he can, being corn-fed and all.
I won't hold that against him.
Consider this, it's a play on punctuation with a parable twist:
Correctly:
The Panda eats shoots and leaves.
Incorrectly:
The Panda eats, shoots and leaves.
If you understand the lowly comma, you can read the difference.
Jim
I promise to be politically correct in all my posts to keep the BBBB from vociferating.