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View Full Version : heads on 78


78zzz
09-14-2005, 11:49:00 AM
can anyone tell me what the heads on a 78z28 350 are like ,are they 76cc or smaller and what was the compresson of the motor thanks

CorkyE
09-14-2005, 11:59:00 AM
'882's w/76cc chambers common - but that is not to say that's what you have. The only sure way is to pop a valve cover and check the casting number. One you have that, go to mortec.com and check it out.

http://www.mortec.com/castnum.htm

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79 Z28 Bought new, honeymoon ride, same wife, same car.

[This message has been edited by CorkyE (edited September 14, 2005).]

Twisted_Metal
09-14-2005, 12:38:00 PM
Like Corky said... Mortec will only tell you how a particular head number it was originally built.

If the heads have been planed, ported or reworked for larger valves there may be a discrepancy between mortec's figures and your heads actual comp. ratio, flow rate, valve size etc.

1978LT
09-14-2005, 12:52:00 PM
I've also seen 462624 on there.

midnight motor
09-15-2005, 07:03:00 PM
ditto on the 624

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Ass, gas, or grass,no one rides for free

My project 79' (http://79camaro.com/)