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1975 corvette wrong engine code

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Old Oct 26, 2018 | 02:49 AM
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Default 1975 corvette wrong engine code

Hi everyone, im Keydel and im new here, i have a 1975 corvette L48,with th350 matching numbers, heres the things all numbers on engine, Car , Dates codes all match but the engine model code, its CKX wish belong to 1972-73 and 1976 corvettes any help
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Old Oct 26, 2018 | 04:15 AM
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You're stringing sentences together without punctuation, while using unconventional abbreviations which muddles your message. Is this what you meant?
Originally Posted by keydelj@yahoo.com
Hi everyone, I'm Keydel and new here. I have a 1975 Corvette L48, with a 350 matching numbers, heres the things all numbers on the engine and Car. Dates codes all match but the engine model suffix code, it's CKX wish which belongs to 1972-73 and 1976 corvettes. Any help?
If that's the case, then it doesn't sound like matching numbers.
So three points:
  1. What's the vehicle serial number or the vehicle identification number (VIN)?
  2. Can you post a photo of the engine pad suffix code?
  3. What date codes match?
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Old Oct 26, 2018 | 06:05 AM
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And 75 came with turbo 400. OTOH, 75 is the least desirable engine anyway. First year of really draconian emission crapola. So your car is not devalued by NOM.

Last edited by derekderek; Oct 26, 2018 at 12:42 PM.
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Old Oct 26, 2018 | 06:45 AM
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Are you sure it's a 75? CKX was for AT base engine cars in 72; it was not used in 75. It was used in 1976 for base engine cars with AT. It could not be matching numbers for you unless you have a 76. Post your VIN.
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Old Oct 26, 2018 | 12:18 PM
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1Z37J5S435708

engine vin-I5S435708. V0915CKX
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Old Oct 26, 2018 | 12:44 PM
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35708. an 09-15 engine build date. A very late 75 could concuevably get a 76 engine code.

Last edited by derekderek; Oct 26, 2018 at 05:43 PM.
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Old Oct 26, 2018 | 01:18 PM
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Could that make the car more Valuable. GM install the wrong engine, in 1975 engines were rated at 165 hp and 1976 they bumped it to 180, is not every day you see a wrong engine that was a mistake from GM?
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Old Oct 26, 2018 | 01:57 PM
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Originally Posted by keydelj@yahoo.com
GM install the wrong engine,
Your engine is the correct engine for the car - it is not "wrong." The VIN is a match. It was assembled on September 15th 1975, which makes your car a very late production car. They would have staged the assembly line with a mixed bag of remnant '75 engines and early production '76 engines. A '75 Vette does not have significant value with or without the "correct" engine - it's nice that it's correct and original, but it does not add significant or special value to the car being a late production '75.

Lars
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Old Oct 26, 2018 | 02:06 PM
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what about HP rating on engine, is it 165 as the 75 engines or 180 as 76?
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Old Oct 26, 2018 | 03:13 PM
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A way to tell would be which carb # you have , the 165 and 180 were different.
165 = 7045222, 180 = 17056208 . calif 180 = 17056506

But you never know, it's like the 65's that had drum brakes.....
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Old Oct 26, 2018 | 03:16 PM
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A grammar lesson?
Really?
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Old Oct 26, 2018 | 05:36 PM
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Originally Posted by keydelj@yahoo.com
what about HP rating on engine, is it 165 as the 75 engines or 180 as 76?
It's completely irrelevant. The two engines are the same. They use the same camshaft (same cam as Chevy used in every pickup truck, station wagon, and Checker taxi cab), same compression, same induction setup. The only difference was in the exhaust system and marketing games that GM played with the ratings of their engines installed in different vehicles. The engines are the same. Call the horsepower anything you'd like. You probably have about 150, and it's the same whether the engine was built in September or July.
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