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Message: <blockquote data-quote="dan filipi" data-source="post: 31430" data-attributes="member: 54">The rebuilder will have the heads done in next couple of days.New springs, all new guides and seals, valves lapped.I had originally planned to put these heads on my runner with the knock to see if the knock has changed, hopefully gone bye bye.Well I know this engine pops out of 4th sometimes under load, has low oil pressure, and a loose primary chain so I've been planning to open up the parts engine to check the condition of it for a full rebuild.Should I install these heads on the runner and waste 2 head gaskets ($50) simply for a test to see if the knock has changed or hang on to them for the full rebuild?50 bucks is 50 bucks but if wasting them is what we need to do to eliminate possible causes of this knock then..........Decisions, decisions</blockquote>