I can not answer that question, well if it happened I have not come across anything to conform it.
I seriously doubt the Boilers were replaced, they were still using Boilers from this period 40 years later. When they were looking at replacing Boilers/Frame and Cylinders this seemed a very high percentage of the value of the locomotive, not something they built in Denver, this was all coming from Pennsylvania,
I assume the shop in Denver could repair the fire damage, might have meant there was some difference between the as delivered and as rebuilt but never seen any mention of that for this locomotive.
I do not believe the Boilers from the Como Roundhouse Fire in 1935 needed replacing, does not sound logical they would suffer in a fire.
I have not come across any mention of increased tube counts, which is not to say it did not happen. I did notice when discussing capability in much later years they used very specific figures which suggested that they were just using what the original specification was rather that current real numbers.
The other thing was when the load capability was mentioned in the early years all the Bogies were grouped into the same category, at the lowest level, now whether that was just for simplicity I do not know.