Hi Tim,
As far as the thrust bearing is concerned just use a small block of wood and use it as a drift to knock the bearing in. Just make sure you keep it rather square when knocking it in. Make sure it is quite well lubed up with a good HTB grease before putting it back into the clutch body.
Also make sure you get the clutch body on the shaft towards the engine so that you have a fair bit of adjustment in the clutch fork adjusting bolt.
From there there's not much more to say but best of luck with it and hope all works well.
Cheers,
BB
