Aligning up the clutch plate, disc and flywheel while bolting it on can be a pain when you only have two hands. I heard of this tip somewhere and it worked very well indeed.
I piece of rod with tape wrapped around it centers everything while you bolt on the clutch to the flywheel. Use the gearbox imput shaft as a template and you end up with this.
Dont forget to put the clutch disk in the right way with the flywheel stamped side facing the flywheel.
Gearbox Slave Cylinder Fitting
An easy way to fit the clutch slave back on the gearbox is to fit shorter bolts, or cut a portion off the end of the existing ones. This allows you to fit the slave when the engine and gearbox are in the car.