I fitted a Dobi HD kit to a 1964 Patrol last year. It came up about 3 inches. For the price compared to other kits it is real nice. Just don't get their shocks, way to short. When you lift any truck you need to flex it to the max. Then measure and then select shocks. This way you will get the best shock fit and unlike the leaf springs you have lot's of shocks to choose from here in the US of A.
I got this to say about lift kits....which I tell everyone who asks me about springs. YOU WILL NOT GET A BETTER RIDE OR FLEX ON A P-TROLL THEN WITH NEW SPRINGS, RE-ARCHED, FORGET IT THEY RIDE LIKE CRAP. NISSAN DOESN'T HAVE NEW FRONT LEAVES ANYMORE SO FORGET NEW NISSAN SPRINGS. NEW LEAVES IS THE ONLY WAY TO GO IMHO AND THAT MEANS KITS FROM AUSTRALIA. BITE THE BULLET AND JUST DO IT, NOTHING IS AS EASY TO BOLT IN AND NOTHING ELSE WILL RIDE AS GOOD.
Now having said that, in caps no less...well there is one problem with a lift kit. This is BUMP STEER that was mentioned already. For those who don't know what bump steer is I will explain. Bump steer is when the truck pulls to left or right when you hit small bumps in the road at speeds. You usually won't notice it when going slow. It is generally caused by two things. #1 An increased angle along the drag link. This being from pitman arm to tie rod. Drag link stock is about like this -- but lifted it will be like this / not so extreme in the angle but you gte the idea. #2 cause of bump steer is play in the front leaf shackles between shackle and leaf spring. Simple to fix this, just add some more large washers and also tighten up the shackle nut. The drag link angle is harder to cure. But a drop pitman arm will do the trick. Drop drag links by the way are not the way to go. A drop drag link would be one that is bent on the center to make up for the change in angle. Drop pitman arm is how it should be done to correct steering issue or ride problems. Simple to do this and any good suspension shop or fabrication shop can make the drop pitman arm. This is also the same deal when you spring over axle a truck. Increase drag link angle and you increase bump steer and other problems such as shimmy. With 3" of lift bump steer will not be out of hand but will be noticable. Persoanlly the bump steer caused on that lifted 64 didn't bother me much as it rode so sweet and flex off-road was killer. But for somebody who does mind the bump steer a drop pitman arm is the cure.
It also depends on what you are after by lifting the truck and or fitting new leaves. For me that is better clearance, more room for big tires and better flex plus awesome ride on the pavement. If all you want is a sweet ride on pavement then you are best to find sprigs at stock heigth. Which are available in Aus from the various spring manufactures such as Dobinsons. Simply tell them you don't want lift just new springs. Also be aware if their springs are listed as 1/2" over stock that is exactly what they are. But if your truck has old flat leaves and you measure before and after....well, you will get more than 1/2" because the truck was 2" or more below stock when you started.
If flex and off-road performance is what you want. Well, remove the front and rear sway bars. Also remove the front limiting rods. I have found a P-troll will flex 4x better or more by removing these things. But you increase body roll on road and also the chances of axle wrap. Body roll is easy to deal with, simply slow down in corners. Axle wrap I had no problems with on road or off with these things removed but it can happen. Simple to cure this also. Custom made ladder bars will do the trick. Cheap to make or have made and easy to fit.
So that is what I have to add at the moment on lifts fitted to P-trolls.
