As above we really need to know what year your car is and whether you have carbs or injection.
The early cars had a single point lucas distributor which was acknowledged as a weak point even in the 60s/70s.
Many converted to Mallory Dual contact , (expensive) or even Unalite (very expensive) but that meant replacing the whole unit. Pertronix was one solution that involved replacing just the breakers BUT as above you also need their coil.
Not sure of the year , but eventually even Lucas did away with points and went electronic, again it was not a great system but generally thought to be "good enough". This was used on all the injection cars (13 CUX and 14CUX) right up to 2001/2
The last +8s (2001/2 onwards) used the GEMS system which did away with the distributor completely, the ecu handled the fuelling and ignition.
There are various suppliers who can do a similar system for you eg
https://www.lloydspecialistdevelopments.co.uk/products-upgrades/engine-management-kits/ at a price. Many speak very highly of these systems. They can be almost individually programmed, use 2 different maps for differing purposes, and will minimise both emissions and fuel consumption.