Start and Ignition Problems on 71 Demon

From a simple job of changing out plug wires and a electronic distributor with a non working vacuum advance on my 340 Demon I have managed to pooch things up to the point of no spark at the coil. I inadvertently switched plug wires and so went thru the drill of finding TDC on number 1 cylinder and redoing the plug wires, but had no spark at the coil, so I swapped the distributor back and still no spark. Car ran fine before I messed with it.

On top of that now I think the ignition switch has quit as in the start position I get no voltage at the yellow wire on the starter relay. Only way to crank it is the old screwdriver trick...any ideas from the experts?

Thanks in advance,

Mark