As the ammo truck uses the 1000Lb bomb (as I recall, it was a long time back!
- which then had to be ensured to be in the exact same slot in all oobs for ammo explosion effects, then you might want to rename that weapon to something else, and put a standard 1000lb bomb elswherein the weapon list (if the UN uses strike planes at all, instead of using Allies for tac air ? ). (it also messes with that requirement for the 1000lb/equivalent Kg air bomb to be same in all OOBS).
Cheers
Andy