I have rebuilt a 1926 Stand six. It was not running when I bought it. Trying to start it now. I made sure cam and crank marks were in alignment. Also that the number one piston was top dead center and fly wheel was on properly and marks showing. Just for extra easy marked every thing on the crank pulley and engine block for timing. It will not fire. Have put fuel in cylinders and use starting fluid in carb. New points, condenser, coil, and plugs. E ery thing set to factory specs. But will not fire. Valves are set to .007 cold, book call for 006 to 008 hot. Rechecked all setting several times. I have spark. Any suggestions?