Bruce I believe the OP was wanting to upgrade to eliminate the points and condenser.
As a side note if the coil presently on the engine is like the Stens 460-014 or the newer electronic Stens 7600-9001 coil, the high tension lead (plug wire) is replaceable; just takes a little work digging out the old lead lead. ON the two fore mention coils the down inside the wire connector is a pin in the middle sticks into the wire. All you to do after cleaning the old wire is use a little epoxy as you install the new wire. to both hold it in place and to seal it against moisture.
Also to note that new Magnetron coil require the flywheel to be spun at least 350 rpm vs the old points system speed of 250 rpm but produces a much more reliable spark timing.
