if e were u i would do the clutch, timing belt kit, water pump, any worn oil seals e.g. crankshaft, camshaft.and headgasket it is much easier out of the car and then you know its done and dusted hopefully you wont have to change anything again. Id also throw in a full service kit i.e. oil filter, plugs, fuel filter and id imagine you will have an induction kit so dont bother with the air filter lol