Thread: Questions on 71' 455
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Old 01-09-2008, 12:25 PM   #2 (permalink)
W30post
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Join Date: Oct 2007
Posts: 33
IIRC it was 8.5 to 1 down from 10.5 in 70. Be aware that a set of Felpro head gaskets on that motor can take it to almost 8.25 to 1.
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