Well, some kinds of springs are 'handed', this is true. Land Rover originals and some OEM ones. Britpart springs aren't, or at least weren't the last time I fitted any. In fact, noting that I had a slight list to starboard, I took them off and swapped them over. Sure enough, the list persisted. Britpart get a lot of stick on here, but their springs are generally agreed to be OK, even the great James Martin, latterly of this parish, used to say so. I've lost count of the miles I've done since then, but it's well over 100,000 and no harm has come to me or the Land Rover. Traditionally, a stiffer spring was fitted on the driver's side to accommodate the weight of the driver, and on some models the fuel tank was on this side too. If all the joints and bushes are nice and tight and there doesn't appear to be anything wrong with the springs, it's probably not a major problem. Gwyn Lewis sell a range of spacers and elevated spring seats which can be used to get it level in the resting position.