* Any temperature 75C or over is good for engine life
* 82C temp is best for oil life
* Hotter temps are used to make the cabin heater run hotter

I would should re-measure the engine cylinder head temp and not rely on what the gauge says. It it's running cold, replace the thermostat -- sometimes brand-new thermos are defective

So you think i should get a thermostat that opens at a later temp?

Good on ya, it'll last a long time now

The coolant mix doesn't affect the temperature (much). If it doesn't reach operating temp, that's a thermostat problem. But one thing I found with those laser-type temperature gauges is where you point it. Best place is on the side of the head near the temp sensor (not near the water pump). Operating temp depends on your engine thermostat stock is 82C, optional thermos are 75.5C or 88C

I used Nulon 60%water-40% coolant premixed, works perfect!
Might change it to 70/30 because its not reaching operating temp no mater how hard i drive lol.

It never freezes where Anth lives, so some are tempted to use plain water. Which leads to quick cooling system damage. Nissan said if you use plain water, to change it every six months. Better, Nissan recommended long-life coolant regardless of the weather. That can last 10 years and still have a clean cooling system

Most times it's the old radiators on the Datsuns that are the problem. I had similar issues with mine, and it just needed a recore...the radiator core was blocked up...probably from someone adding head gasket or radiator leak sealer thinking it would fix their problem, only to create a new one or make it worse. Use proper antifreeze and distilled water on your car and it'll likely never have problems again.

Top bolts fit 100%

I haven't got any bottem bolts in, for the moment i have cable tied them till I get to work then I need to move the holes to suit on the bottem

Those Ali fleabay radiators work a treat. On the 1200 you either have to space it out by 6mm, or lift the holes 6mm to make it fit - no big problem for the gain
Did you have to do it on the b210?

temperature isn't going past half way now lol. :)

well worth the moneys.

I had similar problem and replaced everything, pump , thermo , had it flushed etc. Except radiator cap and that was problem .... It did not really over heat just ran really high . You say engine is running fine , so not the timing and wrong plugs