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454 head question ?????

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Old May 24, 2007 | 07:03 PM
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From: Lake Arrowhead - Georgia > 72 Base Coupe & 74 BB Roadster
Default 454 head question ?????

1974 LS4..............781 heads.

What cc heads are the original 781s ?

and

What does the cc number refer to ?

Thanks........44B
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Old May 24, 2007 | 10:20 PM
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From: Crescent City, CA
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The stock heads vary. The books say any where from 118 to 122 cc's. You need to measure.

CC's are cubic cetimeters of space the heads have in the compression chamber.

When you check compression you need to know the cc of the heads to figure the compression (along with other numbers).

The smaller the cc of a head the higher compression of the motor.

Simplified, hope it helps.
Terry
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Old May 25, 2007 | 05:57 AM
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From: Lake Arrowhead - Georgia > 72 Base Coupe & 74 BB Roadster
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Thanks Terry....That's what I thought, but was not sure.

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Old May 26, 2007 | 05:00 PM
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If so will it also mean that total c.i.d. will vary from engine to engine?
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Old May 26, 2007 | 05:12 PM
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From: Lake Arrowhead - Georgia > 72 Base Coupe & 74 BB Roadster
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Originally Posted by Clue
If so will it also mean that total c.i.d. will vary from engine to engine?
Yes....with the stock (781) 118 cc heads and bored 30 over....my 454 is now a 460.


http://www.angelfire.com/fl/procrastination/motor.html
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