Sounds like your water temps are now okay.
my 300SE runs 85 in the winter and 90 in the summer. but when
stopped at a light in summer, it can quickly go to 100 or 110, then the fans
turn on. It's done this since brand new. 100 is only 212, 110 is 230 - no big deal at all. My Corvette fan cuts in at 228 from the factory.
But it should cool back to 90 when you move again.

However, if you forced water/steam out the gasket, it's just a matter of time before you get leaks from the area above spark plug #6.
it may leak slowly enough that it evaporates before it hits the ground, but you will see the tell-tale anti-freeze residue. All these engines scrub the gasket in that area over time, and usually leak between 100-150k miles, from what I have experienced and read here.
I think the big concern is getting water into the oil. The innermost sealing area is the compression ring - it probably survived. But then the oil passages, and the water jacket are towards the outside of the gasket, if water leaks out, it might leak in, to the oil.

I found water oozing out near the rear at 100k miles.
i just pulled the head off, had it planed, and put on a new gasket.
I freshened the valves and seals while it was off - but that's your choice.
It's really not that big a deal on these engines. just unbolt the intake/exhaust manifolds and lay them over. Then pop the chain off and go for it. The only speciality tool is the spline socket for the bolts.

Plenty of the guys here can walk you through it if you decide to do it.
And I bet you will this winter, when you come out on a cold morning and see AF running down the back of the motor.

Good luck, if you decide to wait, keep a sharp check on the AF level, the oil (foaming or rust on the oil cap) and the area around the back of the head.

DG

Check the therrmostat with the engine cold, nice easy cool job. I bet you'll see it's not all the way closed, there is a small gap in the seal or it is off-center and not sealed on one side.
Gilly

__________________
Click here to see the items I have up for auction at EBay

Click here to see a photo album of my '62 Sprite Project Moneypit (Now Sold)