Truck has fresh wires/plugs/cap and rotor so the basic tune up is done. I have gaskets coming to do the pendulum. I will check the coil for corrosion. Can anyone recommend a "tuner" to get the timming advance back were it should be. I drove it with my scanner hooked up and the highest advance it got was 34* and any little change in load or throttle position and it would drop to the high teens low twenties. That cant be good for power or economy.