I'm looking to pick up some MPG. This 511 is seriously thirsty. I spoke with Don at FBO about his vac distributors a few years back when they were still in development. He wasn't clear if they were available in magnetic pick up or if they would fit without clearancing the valve cover or aftermarket heads. I also looked into Ice Ignition distributors as they have an adjustable electronic advance with 10 or 12 different curves to pick from. You have to have their box thou. Don at FBO will custom curve your distributor if you buy from him.