I had the head of my 2.5 petrol 110 replaced with a Turner Engineering gas flowed head for a few extra horses. It made little difference. But worse, it was impossible to make the valve gear/camshaft/tappets run quietly. I was informed that all the bits have been disturbed' so this is what I should expect. I have been using the same guy who did the job for about 10 years and he knows what he's talking about believe me. I should have heeded his original advice not to do the job.
I now have a 300 tdi in the 110, but if I were looking for more power I would either avoid the harder parts of the desert - especially dunes - or definitely go for a VX80 Land Cruiser (non electronic if poss). There's plenty around for about 10-12k. Don't waste time trying to uprate small engines, you need a BIG capacity engine - there's no other way - ok. Other choices might be a Toyota Colorado, which do well though a bit flimsy, or Nissan Patrols in various incarnations.
I am not anti Land Rover - I own one - but unless the next LR has a sensible capapcity engine, I'll be buying a bigger motor Jap.
Andrew.
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