Maybe for strafing once the bombers released their bombs.
Were these gun pods the same ones used on some A-26s?
ack-ack
No they are not the same. I have not found a part number for the A-26 gun pods. Both pods were made by Douglas.
The ones on the A-26 are a different shape & mounting system to the DGP-1.
I have found the operating manual for the DGP-1 & parts list. Just waiting on it's arrival.
Soon as I get it I will post it.

Here is a few pictures of the pod set up on the A-26.


