Cool! I really appreciate everyones help!

Everyone agree to go with the gemini radiator?

gemini is the way to go, i found mine may need a small electic fan for summer as even stuck in traffic on a 40deg day it may nudge 190-200 farenhite.... i like it at about 180-185... about 83deg c. In the 90deg c range is too close to comfort for me.. a 7inch should do it for manual overide in summer only.

At lonsdale u-pull-it there is a dark/red later model gemini, has a brand new radiator in it, i put the bonnet down last weekend, i intended to go back and get it, only as a spare, because im greedy. Go and grab it if you can, i really cant be arsed.

I'm running an A12 radiator for the nostalgic look.
I've had no problems racing my car on 46c days, but it is a fresh 3 row

N14 Pulsar radiator has the same size inlet and outlet hoses as Datsun 1200, they are on the same sides too, its about the same height as a 1200, the major difference is that it is a lot wider, so a little bit of mount customisation.

This is the way I was thinking of going.

I think it is a bigger rad than the gemini....but if people are not having dramas with standard A12 ones, a gemini should be fine too.

you will most probably have to drill holes, I did in a 120Y. Also the one I had was mounted in the centre, whereas stock rad was mounted flat (shite description, I know) so I used 4 little blocks of wood and long bolts.
Sunny's may have the extra piece you can remove to allow more airflow to a larger radiator? 120Y did.

Stock definately wont cut it. My hot a14 got literally very hot on the highway in summer with a good condition a12 radiator. It nearly nudged 210 in the 110km/h zone on a 38degree day. Went an bought a 12inch thermo and a gemini radiator. What a difference stays at very close to 180 even when flogged on a reasonably hot day and stays spot on when driven sedately. It even handles long duration static burnouts.(i know im a hoon)