Definitely go for the leveling kit. Much more cost effective and you wont need to grow out mullet to drive the truck(sorry to those who still have one but I cut mine years ago). It keeps it pretty cheap and does not force you to buy all the extras as Green Drft stated. One on the nissian I think it will be about 2 inch on the front end allowing a bit larger tires......maybe 33's that will give the truck a good look and still ride/handle nice.
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Never leave a few fish for a lot of fish son.....you just might not find a lot of fish-----Theo