Welcome to the Nissan Patrol forum. To post a question and to see less adds on the forum then you will have to register
first. We are an easy going friendly forum so join in the conversations and feel free to ask any questions.
Become a forum sponsor for only $20 and see no adds with faster page loading times and many extras benefits.
Always good to change them over if you can afford it, but for a 2 or 3" lift you won't need to. I am above 4" and have the stock arms, but the wheels have moved centre back in the wheel arch - eventually I'll get some drop boxes put in, which is a cheaper option than swapping both arms. From what I understand (Tony? Anyone?) if you put dropboxes in at the outset you'll also avoid the need for a caster correction if only going 3" ... Well worth it as the caster correction is a few hundred on it's own.