Find an Evinrude dealer and they can get you all the parts needed, except for the ones that are NLA. For that go with Sierra. Standard coil is fine no need to change it. The Prestolite distributor is very simple, easy to service. If you want to convert to electronic, it is possible but you have to replace the ESA module with one that will work with the electronic dist. All ignition and fuel components (carb, fuel pump, distributor, alternator, starter) must be marine rated for safety. This is no joke, fuel and sparks in the bilge of an inboard can blow you into the next world. Do not cheap out on anything ignition, electrical or fuel system related on any inboard, no matter how cheap the boat was to buy. Also since we are talking safety make sure your bilge blower works and you use it properly and ALWAYS have the backfire flame arrestor in place when you start the engine.