Hey shaeff ! I totally agree with You & the coil & spark plug wires are merely a suggestion & not a requirement I went that route for higher voltage to the spark plugs & of course they had to be red to match the tractorthanks for your + input.I've been using the Pertronix EI setup on my MF 35 Utility for a few years. One of THE BEST upgrades I did. Hot, fat blue spark that snaps hard, easier ignition from a dead cold start in winter, 100% recommend to anyone on the fence about it. Couple it with a nice one-wire alternator and coil (I still run original coil) and you'll notice a serious difference.