Few things.
Does the turbo oil inlet have an oil restrictor in the feed side already?
To get it oil, a sandwich plate like this will suit nicely.
Oil Cooler Sandwich Adapter - 20mm 1.5 Thread
You don't want to push all the oil through the turbo, this will starve the engine of oil, so use the sandwich plate to get an oil feed, then split that feed line to go back into the feed and the turbo in parallel.
For return, look at the right side of the pan (foot brake side), there as some unused section of the pan that can be drilled and tapped to provide a nice gravity drain. Just need to look inside to ensure they will actually drain above the internal bottom of the pan and not try to drain into a puddle.
Raise idle RPM to 900 to raise pressure a bit. You'll want an oil pressure gauge for sure, but, putting it in the sandwich plate bung will only give you total pump pressure, you want to know engine specific pressure, so use the sensor on the rear of the head via a brass T fitting to ensure the engine isn't being starved.
For coolant, look at splitting off the pump output line (I would suggest pulling the metal 90 degree tube that feed the block and welding a -6 or -10 fitting to it so you don't have some crazy T fitting stuffed into the soft hose) and returning to the upper radiator in parallel with the engine.
More later, work calls.
