Drive a Mk 2 Pig steadily, remembering to use 1st gear to set off in and selecting the four wheel drive will ease the strain on the drive train. Have to remember its 2.5 Ton overloaded. As heavy footed drivers can and will break half shafts. Then a long hard job to change and locate a spare.
Lots of owners do remove the internal armour, could be replaced with plywood and covered with 1/16th steel sheet to look the part, others just remove it and have more room.
Mine is a true Mk2 with all the armour, but was converted from a Missile launcher Armoured. So as its not a normal Pig will keep it as used in Northern Ireland with its history. Registration 21BK96
Normal servicing with oils and grease will keep it happy. Doing it every 250 miles will keep the suspension happy, with oil injected with a grease/oil gun.
Will take most part of a day to check all the oil levels, but you will have the satisfaction of owning a wonderful piece of engineering from the Humber factory.
What ever you get, enjoy it. Nigel.