pop up display fails if map is small and pop up is larger. need to fix or turn off pop up.

I used css to change the size of the pop up. However, on maps where I wanted the pop-up bubble larger than the map display the 'overflow: hidden' for the map itself clips the pop-up. Yet 'overflow:hidden' needs to be set for the map because it hides 'the rest of the map'.

How can I get the pop up to display outside the bounds of the map OR turn off marker pop ups for a particular map?

These css attempts did not work...

div.gmap {
	overflow: visible;
} 
div.field-field-location-gmap  .gmap-popup {
	z-index: 990 ! important; 
	position: absolute ! important;
}

See attached picture of clipped pop up.

Thanks for any help.

Jeff