Install the turbo make sure you tighten the oil feed & return lines good. Then unplug ECM behind the battery crank the engine until you see oil pressure if you have a guage if not crank the engine untill the idiot light oil press/choke goes out & then plug the ECMpower wire back in and start her up. Doing the ECM thing allows you to prime the turbo before you start the car.
I noticed you where around Philly, Not sure if you know about the MAGNA club check us out http://www.magnabuick.com/ theres links to our forum on that site.
I would also manually feed oil into the inlet fitting, while spinning the compressor wheel. Do this until the turbo won't take anymore oil. Hook up the oil line and proceed with Grand Nash instructions.
Yes what James said but i do it while mounted on the car with the return hooked up and fill it 2-3 times while spinning the shaft and watching the oil go down then hook it up.