Using the twin assault cannon from the Dark Angel vehicle sprue you can make a nice little conversion to to your Drop Pod to give it Assault cannons instead of the stormbolter.
And if you use magnets you could have all three.



1)First cut the cannon flush behind the red line,sand cut end flush



2)Attach cannons to mount,glue optics in between the mount from DA sprue
Glue the cannon where the stormbolter/missle would go.
If you use magnets you could swap all three




3)Glue the ammo boxes to the rear of each gun




And there you have it.
Use the Forgeworld Rules of Deathwind Assault Drop Pod.
Or just have the baddest drop pod in your gaming group.