I would drive the truck if you can. See how it feels out on the road. Does it ping or knock on hills, or over heat under a load. The timing number is not as important as how it runs. If it runs great at 10 advanced, then thats where you set your timing, each engine is a little different. Back when they were built, everything was equal, fuel, and compression. Now with rebuilds and different fuel per state, you have to set each ones to where they run best and not worry about the number. Drive it awhile and change the timing a degree or to every so often. Then you will now if it is right or not. Don't be afraid to try different settings. Joe
