My first car was the TD. What a classy car. With the Lucas electric [and other British] parts it spent about as much time in the shop as on the road.
A Jag mechanic I knew in Des Moines had developed a nearly 100 percent cure for the Lucas disease. It consisted of a Cadillac Delcotron alternator, a Pontiac voltage regulator backed up with a Mallory dual point distributor and a big Diehard battery. Mallory made a drop in replacement distributor for the 3.8/4.2 engine and the GM alternator was ten times better than anything Lucas ever made. Best of all, the changes were not obvious.