Very. the tires will run flat indefinitely unless shredded to the rim. And they are double beadlock rims.
The raditor is well shielded.
I don’t think the tires would work very well if it were flipped over but that’s my opinion.
Will they burn?
How tough is the secretary who photocopies and sends out the forms to order the new tires? Does she get the same bus home every night?
How tough is the guy who sells the radiator for it? Does he live in a nice home in the suburbs?
It’s vulnerable, very vulnerable indeed. You just have to find out where it’s weak spots are.
What is the round that will penetrate an engine block? I'll bet a few 45s through the grill would find something vulnerable and vital.
/johnny