no, you have not opened a hornets nest. I would do a rewire and make sure you solder and seal all your connections with shrink wrap. Just take you time...make GOOD notes and diagrams and you will not have any trouble. The hardest thing for most people that I've seen, is where the tach wires go. Other than that its pretty straight foward. I've done a few rewires. You'll be glad you did when your done and its a great time to add a few options if you wish. Let us know if you have any questions and post pics of it if you can.
"But if serving the Lord seems undesirable to you, then choose for yourselves this day whom you will serve, whether the gods your ancestors served beyond the Euphrates, or the gods of the Amorites, in whose land you are living. But as for me and my household, we will serve the Lord.” Joshua 25:15