thanks for your help guys,all the best.

Nissan OEM #'s are:

Air- 16546-51H00 ( this is what is on most J models with a TD27)

Oil - 15208-43G00

Fuel - 16405-T9005

Fuel filter O-ring- 16407-W4900

(replace this O-ring when you change fuel filter,a lot of poorly trained or sloppy techs don't and loose this when they pull the old filter off,or don't know it's there and start having issues with starting.) It sits at the top of the tube on the fuel pump/bleeder.
Take the time and just remove the battery to gain access to the filter, it make the job go a whole lot smoother with it out of the way.

nissan engine use a quite std filters for there engine
crossland numbers fuel 370 or 5013 oil 2029/694 or 2048
valve clearances 0.35mm [0.014 in]