There should be one bolt on the engine bay side of the firewall, one on the interior side of the firewall, then take the pin out of the pushrod where it connects to the pedal by removing the circlip holding it on.. and take off the hydraulic line running to the SC.
The two bolts on the actually MC are bastards to get to, a ratchet spanner would make easy work of them.. an hour for the first time probably isn't too bad, 20 - 30mins it would normally take, though.