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Message: <blockquote data-quote="ace_800" data-source="post: 5462732" data-attributes="member: 554627"><p>I just found out I got a extra 389 Tripower engine with my 66 GTO I bought, standards a 335 which is currently in.  Decided I'm going to rebuild the 389, but don't know what I should replace with better parts.  Ross dished pistons I've been told so I can run the stock heads with pump gas and not destroy the engine.  Since the Tripower doesn't like 92 octane with the stock 10.75 compression and that I should run it at 9/9.5 to 1 compression.  What else should I have done?</p></blockquote><p></p>

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