Shackles

Ahh one from a local radiator dealer here in NQ who deals nat-rad units. Has a 3 year warranty as long as I keep the fluid changes up to it. Doesn't seem like a bad unit

Just for anyone that is trying that has similar issues in the future. Had a very helpful mechanic give it a good clean, which helped a lot - but the temp would still sneak up. Anyway, when i got back to home i bought a replacement radiator and put that in. Absolute world of difference, never over heats now. 
Cheers for everyone's help!

Thanks for the replies fellas! Gee you all gave me some options to think about.  I tried rebleeding it this arvo on flat ground without the radiator cap (thanks for confirming Mr Polson and outback Jack). After checking air bleed hoses, cheers dean kdc. When idling the level on the recovery tank did come up, and came up even further when revving more. I noticed some big bubbles initially (hopefully air lock), but when giving it a few revs also noticed more of an off white foam – im guessing this is what you were talking about bear351c?. This foam though did settle while running the car. Level decreased after turing off car and letting sit for a while. Thermostat definitely opened. No white smoke out of exhaust though.
So I’m guessing that’s a leak between the coolant and exhaust manifold like Dave said? Thanks for the run through ReVhEad, will be a good excuse to put the the tickford head I have floating around. I heard the go was putting in au mps type gasket – so I will try that I reckon
The only other thing is that part of the gas system sits quiet high, part of it in line with the recovery tank – would their be any point in future in bleeding it with the drivers side front pointing slightly towards the ground? Ill keep an eye for all that crap thanks Banno.
Thanks again lads