What is the stock CR on L98 heads?

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Apr 24, 2001 | 11:59 AM
  #1  
What is the stock compression ratio on a 1988 5.7L L98 iron heads? If I plan to go to aluminum heads in the future what cc should I have them milled to? I don't plan to shoot nitrous or run a blower.

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1988 GTA 5.7L TPI Auto
355 ci. block,TPIS ZZ-9 Camshaft, SLP Headers, Borla Cat Back, B&M Holeshot 2400 Stall Converter, 3.73 Richmond Gears

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Apr 24, 2001 | 12:41 PM
  #2  
9.3:1

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91 Formula 1LE 1 of 46
305 TPI 5speed
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Apr 24, 2001 | 12:44 PM
  #3  
And the combustion chamber volume is 64cc's.

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