Its only my opinion, but i wouldn't fit a lift to your D1, let alone such an extreme one. It appears you'll be lifting it 4 inches - and to tow with this, you'll need a removable tow bar ( else it becomes a boat anchor ).
I fail to see how such a vehicle will be practical as a tow car for a caravan - and I also fail to see how it will be reliable enough to be same, with such extreme mods. (I.E. extreme off roading will take a toll on half shafts / UJ's and such - and towing with a broken half shaft is unlikely to end well, IMHO - YMMV )
That's some good points your making
I have already bought a removable drop hitch that takes care of the lift
Also I was totally unclear on why i was using my intended setup
The 2" lift blocks are well removable with not much work so if I find the 4" lift to be to tall I can take them out
And as for reliability well that's just laughable in my opinion
Yes using my jeeep off road is going to reduce the reliability of its driveline but that's all down to maintenance at the end of the day
It's all being replaced from the word go before it even sees the mot ramp for starters and what ever can be upgraded to HD stuff is as its cheap as chips
The 300tdi is a very reliable lump of looked after properly it my be my first ownership of one but it's not my first rodeo I have looked after them for many years
I am used to running very expensive German cars and not shy of maintenance costs v12 bmw main dealer service I could of bought a 2004 disco in good nick !!
It's like everything else if you don't look after it how can you expect it to look after you ? My mate has used his disco all over Europe towing a very heavy American caravan and with it being slightly modified engine and for off road (not lifted) but running air lockers front and rear he has never had it fail to an extent it couldn't be repaired at the roadside with the basic tools every LR owner should be carrying anyway
Thanks for your concern tho
I don't plan on the landy beinng the most reliable bit of kit I have ever owned but it's definitely not the most unreliable thats for sure
Have a nice Christmas