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numbers help ??????

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Old Oct 4, 2002 | 10:56 AM
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59intheworks's Avatar
59intheworks
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Default numbers help ??????

Any info would be helpful.

Diff. 3707308(the 8 may be a 6) GM3

Master Cylinder 5456022
10168 1" Dia R4
end plate 5454480 320-G
Delco
Moraine Products Div.
Dayton O. USA

Thanks for any help, Ray
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Old Oct 4, 2002 | 11:14 AM
  #2  
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Default Re: numbers help ?????? (59intheworks)

Diff. 3707308(the 8 may be a 6) GM3

Master Cylinder 5456022
10168 1" Dia R4
end plate 5454480 320-G
Delco Moraine Products Div.
Dayton O. USA
On the master cylinder, one source says 1957 to January 1959 while another includes up to 1962?

:confused:
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Old Oct 4, 2002 | 04:03 PM
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Default Re: numbers help ?????? (67HEAVEN)

It's 3707306, which was a one-year-only 1956 Corvette center section casting, used with open-only diffs (no Positraction until 1957, which used a different casting).

The numbers on the master cylinder are good - it should also have a cast iron cap with 5300880 cast in it; if the car was built before January '59, the last three digits of the master cylinder casting number ("022") will be the same size as the first four digits; if it was built after mid-January, those last three digits will be larger than the first four.
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Old Oct 4, 2002 | 04:40 PM
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59intheworks
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Default Re: numbers help ?????? (JohnZ)

Thanks guys

John, I have a 59 and would like positraction. Since this is a one year only 56 item, is it something that has any extra value to someone rebuilding a 56? or should I just keep it in mine.
Thanks, Ray
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Old Oct 4, 2002 | 05:10 PM
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Default Re: numbers help ?????? (59intheworks)

Yes, it should be worth something to someone who's restoring a '56 to "numbers-correct"; after 46 years, many 56's have had the center sections replaced with later Posi pumpkins, and an original '56 unit would be a "find" for some of those guys.
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