I recently picked up a 240z from an old guy that's had it for decades. It's in really great shape but hasn't been driven in awhile. I changed th oil when I got it home and have put a couple hundred miles on it. I noticed that it's leaking coolant in several places, one spot seems to be coming from where the head and block meet but definitely from a couple of the hoses. I started draining the coolant to flush it and found it to be very milky. I've attached a pic. It's not smoking or overheating so if there is something going on with the head gasket it doesn't appear to be severe yet. Anyone have any ideas of what the issue could be?