:welcome: gillie to iboats. Good to have you aboard!
I actually did a search on your engine's model number and I can't find a 1974 60HP Chrysler engine listing anywhere. I found lots of other Chrysler models but not 609HA. But I will tell you that other HP series in that year model have coils but they are really expensive. So if you do find your model engine and can find the proper coils, it is going to cost you a pretty penny to buy them... Have you actually checked yours and know they are not working? I understand you stated they are cracked, but do they still work? If so, you may have to coat them with some epoxy to seal them again and use them... IDK :noidea: