Let me get this straight. Car was originally a 6-cylinder, now its a V8 and the coil has been replaced?
I believe it doesn't matter, both are wired the same.
There is ONE wire coming out of the top of the resistor and going to the positve side of the coil, no other wires from or to the resistor (this in and of itself doesn't make sense to me).
I believe you're describing a filter, read condenser. If there is ONLY one wire coming out of it, cylindrical, and silver(?) in color, then it is a radio interference filter, removes the ignition noise, sparks from the points opening & closing.
The other wires attached to the coil would be as follows:
Negative side: one black wire to/from distributor.
Positive side: One white/orange/purple wire with cloth wrapped around it and comes from the firewall connector over by the brake master cylinder = this is the IGN supply wire. Another yellow wire from the "R" terminal on the starter solenoid. This yellow wire is the start ignition voltage providing ignition during the starting event.
Stay with 45's plugs, middle of the road heat range, they will keep themselves clean in city driving.
If a Petronix has been installed, then replacement of the resistive wire is needed. One can do either choice. Take the existing cloth wrapped wire and insulate the coil end and keep it there for future hookup. The other choice is to go back to the firewall connector, cut the wire about three inches from the connector and substitute a length of 14AWG. Solder in place, and insulate against the elements. Or, run a new complete wire from inside the fuse block from an IGN terminal out to the coil and tie off the original wire.