i have been told that they can be done in place by removing the transfer box then removing the gearbox ,and it is easilty possible but there is one sod of a bolt in the transfer box just next to the speedo transducer ,if that is in place it would make removing transfer box very hard indeed ,but with that left out ,my clutch will be done in place next time
at the end of the day its just a car ,held together by nuts and bolts lol
ROB