The brakes were upgraded with new master cylinder, new servo, «Coopercraft» calipers an the front and «XJ» brake calliper conversion at the rear. (classicandperformancecar.com)
How do I bleed the master cylinder for the first time without screwing the new master cylinder up? (mechanics.stackexchange.com)
Lastly, if the new master cylinder doesn't come with the reservoir, obviously you'd move the old one to the new one. (mechanics.stackexchange.com)