I would put in a New set of Autolite #3116 Plugs..
The ones you have may be fouled too bad for it to start at this time..
Have you looked at the Points in the Mag..??
Run a point-file through them but do not change the setting..it ran before so it should again.. The more you change, the more that may keep it from running..! Make sure the inside of the Mag cover is Clean AND Dry...ANY moisture in it will give you trouble.. Ron..