Great stuff, make sure the xjs has the vent tube rear diff cover, Johnny is a saint. As for the mileage I have MODEL A'S to GT40'S. The mpg was a fluke that became interesting fodder for MY ETYPE GROUP, who when we took trips across the country tried things to conserve gas or to make the trip in less stops. From triple su's to electronics, there is no other old car in the world that can actually except and adapt to the change.
Drive on...
GTJOEY1314
