Just open the high end needle up a couple turns and start it up.
Then go wide open and slowly close it until you get the high rpm peak. The open it back up a bit (maybe 1/4 turn) until the engine sounds rich and looks for a nice smoke trail out your exhaust and run it like that for a tank or two.
I have always broke my engines in on the plane and in the air. Test stands are nice but a waste of time.