Defiantly. I'm just pulling numbers out of my .... you know. But as you state, Pappy Gunn modified B-25s in the field and the modifications ended up being produced on the assembly line from the factory. By your definition there would be no B-25 strafers at all.
As for the "glass nosed" B-25C strafer, I believe it is more of a visual offering merely for skinning purposes. B-25C's with strafer setups otherwise being the same.
wrongway
Well no C/D straffers from the factory pretty sure of that & maybe even G's? H's some are factory no question a lot of pictures I have of them show no blisters pods at all & some of the very same plane with & with out them.
The J model I would say was almost 100% fitted with the blisters at the factory.