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Old 12-07-2010, 07:22 PM   #1
GMC70c20
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Join Date: Feb 2003
Location: Iowa
Posts: 974
decking 317 castings

I want to take my lq4 from 9.5:1 to 10.5 or 11:1, I was hopeing I could get this by decking the heads. If I took .030 off the head gasket surface how much would that shrink my chambers?
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1970 c20 converted to c10 sleeper
1979 c20 the wood hauler
1991 honda civic daily driver

spray and pray baby
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