[urq] Boiling Antifreeze in the Head? Is this normal?

[Quattrodude]

The car...basic 83 WX URQ...nothing too fancy, but just curious, is this
normal after a typical driving run? 
 
I can hear it bubble for about 1-2 mins after turning off the car. There is
no that much pressure in the coolant tank, and I'm in the process of
installing a water temp gauge.
The oil temp for the entire hour or so I was driving it was mid to low (as
it was a nice cold day out). I was not pushing the car with boost etc...I
have not lost any antifreeze.
 
I looked on line and I have found others that say its not uncommon? but
thought I would check to see what others say? The cooling fan does come on
as normal, I do have a "cooler" thermostat in the car and nothing seems to
overly hot?
 
I have fresh antifreeze, prestone that was a premix, so I think I'm good
there? 
 
What have others experienced?
 
Thanks
 
JP Chaplen
83 URQ