universal ignition switch

I also have a 1 wire alternator if that makes a difference . I was also thinking I might need to use relays because all the switches I have seen only handle 10a and the factory switch looks like it has 10 ga wiring so im assuming it was more heavy duty. I have also thought about buying stock replacement switch from any old mopar with a dash mount ign switch like a 68 cuda for ex would this be better? I don't think they come with the mounting bezels was one problem