Hi John thank you so much for your reply, I bought a new ignition coil and the shop said that's the one don't need resistor so I cut both wires going to the resistor and wired together directly
I have measured the power to the coil is about 11.5v when battery posts show 12v
I also bought a inline spark test which lights up but spark is very dim ( I had to put spark plug in a cardboard box to see it)
Maybe distributor ? I took it off without moving the shaft not sure if that still moved the timing? Yes it's a flathead engine