Keep in mind you want about 10-20mm play left to right on the steering wheel, that is around factory spec. Any less and you are loading the bearings, especially if they are already shagged it's only going to increase the wear.

Surely you have a service manual, that will tell you how to check and adjust everything under the car.

And for comfort, stay away from gas shocks... only good for holding up tailgates or clubbing useless slackass mates. Go hydraulic or rebuild the original wet leg with seals from nissan.