If its had 4x4 carpet in you won't see it as the carpet is formed and will be that shape until it gets flattened.

TBH you will have to go look at it and get underneath to see the work done.

I.e has it got 2wd rear diff or 4x4? what gearbox crossmember has it got (hope it not a angle iron conv)

Its not a difficult conv once the mods have been done, it's just replacing what has been taken off.

One thing on the advert is he lists it's got 4pots is a bit as the brakes are different 2wd to 4x4 and unless brackets are made the don't swap over.