I'm sure a B-52 could drop napalm, but really don't see it ever being done for numerous reasons. In Vietnam, photos and film show the most common bomb types as 500 lb Mk.82s or 750 lb M-117s.
Considering the standard operations of B-52s to minimize the vulnerability by flying at high altitudes and their top speeds in the combat zone, a napalm strike from 25,000 - 30,000 feet with the inherently less accurate and smaller blast effect of napalm cans just does not sound like a good use of resources.
F is for FIRE, That burns down the whole town!
U is for URANIUM... BOMBS!
N is for NO SURVIVORS...
- Plankton
LSM