To find number one firing stroke, you need to take the rocker cover off, rotate the engine till you see number 4 valves rocking then watch the timing mark on the pulley.
When you have TDC on the pulley & number 4 vales rocking you are ready to fire on number one. Set the dizzy to just open the points and wherever the rotor arm is pointing, that is number one. :)
It should then start but you will need to further tune the timing with a strobe light.