When doing a headgasket....
Make sure you get the head pressure tested and level checked. Also skimmed if necessary.
When the head is off the cylinder liner height should be checked using a straight edge if the heights are within in specifications for the Landrover multilayer (MLR) gasket it can be used.
According to Landrover when fitting the MLR gasket a reinforced block ladder should be fitted but in truth it isn't required.
If the liners are outside the range for the MLR gasket then they may still be in the range where the original MG-Rover Paynes gasket can be successfully fitted. If they are worse than that it might be that a special gasket set made by Paynes. could be used BUT it is usually better to find a new short engine.
Make sure you DO NOT turn engine when head is off because it will dislodge the liners.
p.s i`ve been a mechanic for 26yrs.