If #4 plug has spark and #1-2-3 does not I can not see how sticking something in the plug hole to make sure where TDC is or adjusting the timing is gona make one bit of difference.
Maybe one of these guys can explain that to me.
If you have not moved the distributor since it last ran I would not mess with the timing till I got all 4 plugs firing.
I would think one of the below is your problem.
Your points are set to close; your distributor cam lobes are worn; your distributor shaft bearing is bad causing the shaft to move side to side; your cap; rotor or plug wires are bad.