If you want to be certain, pour some 50/50
antifreeze/water in and then drain the mixture out.
I do not know how low the drain plugs are on a FE, but years ago a friend who pulled the drain plugs on a car that set through the winter, it did freeze and break. That particular engine had the drain plugs part way up the water jacket.
I had a tiny amount of water leak into the
oil in the lower unit on a boat engine, and it froze and cracked the case. It hadn't occured to me that I should drain the
oil.