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#1
04-05-2005, 05:31 PM
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Vortec Heads on '74 Corvette
I have a 74 corvette with the base engine. I want to put a set of vortec heads with 64cc chambers but i am concerned about the compression ratio increase. I want to keep the compression ratio around 9.5. Would i have to change the pistons to do so? What is the stock compression ratio on a base 74 engine? How many CCs of dish or valve reliefs are in the stock pistons?
Any help is appreciated. Last edited by Vette34; 04-05-2005 at 07:56 PM. 
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#2
11-16-2005, 03:30 PM
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Re: Vortec Heads on '74 Corvette
the stock compression on a base 74 is 8.5 - 1. I think putting on 64cc heads should b alright cuz i put on the edlebrock rpm performers and they were 64cc and the cars runs great.
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