Why look if it is running good. White smoke is normal most of the time depending on starting conditions/weather. Its nothing more than a vapor or steam.
If a head gasket is blown it will bubble at the radiator but you will KNOW them when you see them. I suspect the bubbles you see is nothing more than that, water/air bubbles.

If you have a problem you should also be losing some water!! Check the level and leave it alone. Drive it awhile. It at least sounds like your worrying unnecessarily. If your getting water in the combustion chamber you can also tell that by looking at the plugs.
Drive it and keep and eye on it. If it ain't broke don't look for a reason to fix something.


1937 Chevy Pickup
In the Gallery
1952 Chevy Panel
In the Gallery
More photos
1950 Chevy Coupe
Pictures!

I'd rather walk and carry a Chevy hub cap than ride in a Ferd.
I can explain it to you, but I can't understand it for you smile