Canadian Pacific FP-7 question

[cnrglen]

I'm just finishing up some details on a Canadian Pacific FP-7 A and B set and was wondering if anyone could tell me if the B units were equipped with the icicle breakers or were only the A's? I can't seem to find any prototype photos of B units with them.
Also would anyone have a decent photo of the roof of an A unit for placement of the Icicle Breakers?