My B310 sunny has a old A14 in it and now its summer it runs it bit hot than i would like it to.
Can anybody tell what could i easly up grade my radatior to some thing biger from another datsun or another car all together?

Gemini ratiator... Check the tech wiki

Or give ya cooling system a flush and get a new thermostat and radiator cap.

had same problem last month ,done what andy said made a huge change for the better .also used a good coolent

Gemini, corolla 4age model, n12 pulsar, s13 Silvia, many of options but a good flush by yourself or a radiator company, you may even need tank/core replacement! Or get a custom one made!
But as Andy and scottO said flush, new coolant, cap and thermostat may solve your problems and be the cheaper way to do it

Yes i gave it a flush cap is not that old i think will just get a biger radaitor.
I think the engine just fked it blow,s a lot of smoke and doesnt run that good at all. I think i have done all i can rebuilt the carbie. Checked all the leeds tested with a meater and cleaned points and plug,s my mechanic keep,s telling i should Rebuild a good egine.

To determine whether it needs a rebuild, give it a compression check.

Put some new plug,s in and guess what it runs ok now.
Till the next time it foul,s the plug,s agine.
I think its about time i rebuilt a egine

foul with oil? or dry black stuff?

if its oil then head or rings are leaking, if its dry black stuff then it probably just needs a tune as its running rich

Every time i take them out thay have what looks like carbin on them not realy oil
My mechanic said the mixture is ok