Please be aware that the marketplace is flooded with low grade reproduction copies of the original UK Lucas distributors which cost $7.50 in batches of 500.
In most cases, neither the advance curves nor vacuum characteristics bear any relevance to the vehicles they are claimed to be suitable for. They are potentially very detrimental to the health, performance and longevity of your engine.
At the Classic Car Clinic we can service, rebuild and modify your original Lucas distributor. Using our distributorgraph machine we can alter your mechanical advance curve to suit modern fuel.
Vacuum advance diaphragms are also a common failing point in the ignition system. We carry a stock of new / reconditioned vac advance units sold on an exchange basis or of course we can test and replace if required.