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differance in heads

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Old May 20, 2007 | 05:45 PM
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ThermalWake's Avatar
ThermalWake
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Joined: May 2005
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From: sacramento california
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 May 20, 2007 | 07:55 PM
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SHADY280
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Joined: Jan 2005
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From: Mission, British Columbia
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 May 20, 2007 | 08:28 PM
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WildmaN
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From: Mesa, Az
Yeah as far as I know. Dished pistons till '81. Then they went to flat top ones.
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Old May 21, 2007 | 08:53 AM
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hoov100's Avatar
hoov100
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Joined: Sep 2005
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From: palm desert
my 81 NA zx had flat top..
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Old May 21, 2007 | 01:37 PM
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WildmaN
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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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