There is not exist, even today, a tank who can resist a straight hit from a bomb 500lbs, let 1000 lbs and more.
If the bomb hit 2-3 metres away thats a different story,
but a straight hit on his head, the tank is toast.
I am talking for today tanks, M1s ,Leopards2, T80s. Let the WII tanks.
Forget wwii HE rockets. Only anti armor rockets maybe do some damage.
In AHII take two 1000lbs, go @ 5-6k and dive straight down on his head 70-80d angle and let him wandering what have happent