I know the tech wiki has a little bit of info and so does google but can't find any solid info on the swap

No one has done a step-by-step guide.

Fitting it to a B310 is exactly like fitting it to a B110, except that there is more room in the B310. And many here have swapped 4A engines into Datsun 1200s.

Since it is only 1.6 liter, the stock B310 diff (H150) is already strong enough.

Even easier as the B310 crossmember suits the RWD 4AGE sump better than a B110, Only 1.6 Litres maybe DD but I have seen one in New Zealand still at 1.6 Litres that had over 220 HP in Group A legal trim and that would make a H150 last about 50 feet.

The AE 70 Corolla these were stock in had a Differential and axles much the same as a 1200 Ute size wise and with a Sunny B310 a Japanese Stanza PA 10 complete rear axle assembly is noy too hard to bolt in just a little bit wider but the four link setup fits up OK.

Speaking of the Four Link setup the stock subbers were rubbish soft even when new replace them and feel the difference just do not go too hard and then complain you ripped the mounts off the body for the links.