JW. it is in furtherance of my effort to determine why my MPG has dropped. I plan to drive to Dayton Ohio next Saturday for the Vintage Truck Show before I make further changes. I replaced the PCV the other day. I am thinking of replacing the HEI but for the $200.00 it cost I can buy a lot of fuel. New shocks are being installed Monday and I am reasonably sure that is not the cause of the MPG drop.

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