I think they only offer one spring for the 3 inch lift so there's no picking the right spring for the specific build. I'm running the heavy arb bar, winch with steel cable, and load up the back pretty heavy for long trips so maybe it would suit tho.No worries!! I think it depends on if you have a heavy front bumper/winch, armor, tire carrier.
Give Dobinsons a call and see if they will walk you through to the right springs. Here in the US, Mike did exactly that for me. They worked out perfect. Good luck!!!