A cheaper alternative to a HD track rod is to weld a piece of 6mm angle to the bar. Cheap as chips to do, flat edges makes it easy for multi grips to bite to adjust. Spray it black. I'll buy you a case of beer if it gets picked up in an roadworthy pink slip. To those that will cry "illegal" save wearing out your your finger tips, yes i know there are Rules. Rules are subject to interpretation and argument.

If you are merely touring and not tackling tough tracks that call on long travel suspension and lockers then keep it simple. The "driveline" on the truck from the factory will get you around the globe multiple times without failure. Personally i'd focus on replacing service parts have a tendency to give up the ghost in the middle of no-where. Things like heater hoses that you don't turn your mind to. The oil pump bolt in the TD5. FYI there is a short length of hose under the exhaust manifold that steps from 3/8th to ?" and with age and heat exposure will deteriorate. It's a RPITA to replace on the side of the road because of the step up in diameter. Get in there and have a look at its health.

You've made a good choice with your suspension and if it holds the weight and offers a nice ride, don't mess with it. If your TD5 has TC then an ATB will give you a little more traction control but again that's moving into the 'want' and not a 'need'.

For every action there is an equal and opposite reaction. Modify one thing and you will join the line on the water slide of chasing bigger, better, higher, faster, stronger.

my 2c's coming from someone that has owned 2 defenders and dropped the purchase price on a third in modifications over the years.

MLD