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Old 10-08-2012, 12:20 PM
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Have you considered doing a leak down test on the engine?Have you done any full throttle passes through the gears yet?Have you taken off the valve covers and done a visual inspection? generally I have not heard a lot of complaints about the rpm heads,at least not quality of castings.They do not make a lot of power though. If the intake manifold is not sealing the the idle will start to deteriorate.Are any of the plugs fouling?
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