When the new coil doesn't work, come on back for some circuit-tracing advice. Shotgunning parts at a problem rarely, if ever works. Experiencing sudden, catastrophic coil failure is about as likely as finding a chicken with lips.
Jerry
I have not looked at chickens a lot, so I will take you on your word regarding their lips

I agree that 'just' throwing parts at a problem does not always make sense. but in this case the reason for changing the parts (and the coil) is that they needed changing out anyway - all looked ancient and problems waiting to happen. I would post pics, but I think you know what I mean.
I had changed the plug wires, cap, rotor, and plugs some months back, but never got around to the points and condenser (so I just did them).
so, the coil is the last obvious thing to test/change.
will post back once the coil is in.
thanks for the offer for advice.