Wow, I dont understand how an entire head gasket can blow due to a low level of coolant--even for a short time. I think i mighta lucked out once when my father was driving my car the inlet neck was broken, and all the coolant ran out, temp rose to 120, but soon took it to a shop--replaced radiator--everything was back to normal.
Im praying for you Larry--lets hope its something smaller.
Keep us posted, and good luck.
Monotoned Smoke Silver
97 Style Replica E420 Rims 205/55/16