Oil changes. New engine, gearbox and differential oil along with a new filter. I used some Blue Hylomar on the diff plugs as it has been leakiing a little, so hopefully this might fix it. Also managed to break, fix and then break my timing light in the space of a day, so I'm going to take the opportunity to buy a nicer one with a dial-back advance to make dynamic timing a little easier.

Gear oil, liquid gasket and socket on the floor next to the car.
Changing the diff oil and adding some sealant to the plugs to stop leaks.
Gunson timing light with the case open showing its innards.
Timing light trigger broke