Ok, I've read all the ancient posts regarding MSD and Jacobs ignitions. Basically they all say that Jacobs is junk, and that MSD is ok, but not the great magical performance piece that the ads make it out to be. I've read the ignition book that the Jacobs guy wrote and am wondering why his stuff would be "junk". Now I'm looking for the real truth (which is why I've posted this here, LOL). What's the real skinny on magical ignition boxes. Am I gonna see any mileage improvemnts? The guy at Camping World says the RVer's swear by the Jacobs stuff. Any input would be GREATLY appreciated, considering the $$$ these things cost!