My car 1984 monte carlo ss with a stock 305 was running and idling rough. I replaced sparkplugs new (acdelco) brand new spark plug wires and a new distributor. Before I took out the old distributor I marked were the rotor was pointing . The new distributor went in but was not exactly pointing to the mark from the previous one as much as I messed with it I couldn't get it exact its close. How do I check to make sure everything is were it should be including the timing. My battery died so ill be charging it for tomorrow. The pic is were the old one was pointing in the red line the blue is about were the new one points .