C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

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Old Oct 20, 2019 | 01:55 PM
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new here and I've read for this question but confused about the answer . 87 Corvette with aluminum heads. ALL MY INTAKE BOLTS ARE AT 72 DEGREE ANGLE . is this the stock heads or do I have a frankinstin motor? O and the intake part number is 10066013. Thanks
And no I can't see any casting numbers on the heads or block or I would of just goggled the numbers
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Old Oct 23, 2019 | 05:25 PM
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You should have 128 heads. I think there 90 degree bolt holes in the middle.
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Old Oct 23, 2019 | 06:39 PM
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Originally Posted by Tunedport90
You should have 128 heads. I think there 90 degree bolt holes in the middle.
Is it possible to have lt1 heads? I'm having a 383 stocker being built for me out of state and I told them it was a 87 Vette and he asked if it had center bolt valve covers and yes then they have the right heads for me to use when they build it just need to make sure I don't get the wrong heads for my intake
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Old Oct 23, 2019 | 06:54 PM
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No you wouldn't have LT1 heads on that car, LT1 is reverse cooled and the coolant passages won't line up.

Look under the valve covers to get the casting number.

Last edited by vader86; Oct 23, 2019 at 06:59 PM.
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Old Oct 23, 2019 | 07:03 PM
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If it wasn't such a pain to get the covers off I would the motor not pulled yet waiting for the new motor to come
Is there numbers in the back of the head I might be able to read with a light and a mirror?

Last edited by Brandonvette; Oct 23, 2019 at 07:05 PM.
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