Mallory Distributor. Whether you select a point-type distributor or the electronic UNILITE, Mallory will not disappoint. XKs has sorted through the maze of components on the market and has boiled down what works best for Jaguars. We carry a full line of Genuine Mallory replacement parts as well. These fit all model six-cylinder Jaguars from 1957-1974 originally equipped without fuel injection. Unilite is used on negative ground cars only. Mallory Dual point distributors will function on positive or negative ground cars. To upgrade with a new distributor assembly, the original Jaguar drive dog and hold-down clamp must be retained. They are also available new (drive dog LU-420620).