If you are going to lift it dont get IFS. There is alot of work that has to happen to get an IFS lifted. TD will always produce more torque and better fuel economy then petrol under realitive circumstances.

Compression tests are not easy on Diesels either so its a bit of a hit and miss with that diagnostic.

Look for something with some Air/E/Mechnical lockers makes offroad alot easier. If its from a car yard, just pop the fuel tank and see if the inside if full of red dust or look for obvious signs of mine site apparel that would of been bolted to it and left bolt holes.