Thread: How many people are successfully running 10-1+ compression Iron Head 400's on Pump
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Old 08-27-2019, 10:19 PM
MUSLCAH MUSLCAH is offline
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I have the original motor and tranny and rear end in my 67 GTO..670 heads ..matching intake and a 1969 Service carb...Q -Jet.....just put 93 octane in it....no problem.

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