Like stated before, if its not blue to your eyes. Its fine. I would drain the oil, then put 1-2 quarts of oil in it. I would get a priming tool and with the intake off run the oil pump. See if all the water is out of the oil galley. Once you see mostly clean oil bleeding out of the lifter bores and the heads. Might not hurt to let the coolant settle in the pan and drain it, until oil comes out. Add a bit more and repeat. I would let it sit over night and drain the oil out. Get as much water out as you can. The rest will boil off. Water right? Not coolant? Been there myself, but just water.