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Old 12/27/2010, 07:28 AM   #2
Mosesatm
 
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Location: Spokane, Washington
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Check out the volume difference between the '68 2V and 4V heads (63 vs. 53.5).
The 289 2V heads create a compression ratio of roughly 8.5, while the 302 4V heads are in the 9.5 range.
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