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Forum: 70-73 Firebird & TA TECH 10-15-2013, 03:44 PM
Replies: 28
Views: 1,643
Posted By 'ol Pinion head
Jones, don't follow your reasoning, they are NOT...

Jones, don't follow your reasoning, they are NOT identical.The chamber volume of the heads... 70-72cc (virgin 12's) & 78 cc (virgin 13's) is a considerable design difference & while I doubt it...
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