Re: 1963 Evinrude 70HP
Here you are trying to convert an automotive ignition system to electronic. Look around and you will find a dozen people with electronic ignition trying to figure out a way to convert theirs back to automotive ignition. Be happy with what you have.
Condition is everything. It will idle and shift just fine, if in good condition. If not in good condition, well junk is junk no matter what model it is. Matter of fact, now that you have mentioned it, the electric shift is easier to operate than mechanical shift.
BTW, if you insist on electronic ignition, look around for somebody that has a 1967 and swap ignition parts with him.