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differance in heads

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Old 05-20-2007, 05:45 PM
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differance in heads
is a N42 head have higher compression than a P79 and does it have round or square port exaust. does the block from a 75 have flat top or dished pistons
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Old 05-20-2007, 07:55 PM
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the n42 head has square ports for the exhaust, and would have a higher cr than a stock p79 which has round ports with liners. as for the block part, i believe (dont quote me on this one) is has dished.
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Old 05-20-2007, 08:28 PM
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Yeah as far as I know. Dished pistons till '81. Then they went to flat top ones.
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Old 05-21-2007, 08:53 AM
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my 81 NA zx had flat top..
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Old 05-21-2007, 01:37 PM
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^^Yeah that is what I meant to say. lol They started with flat top in the '81 year.
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