I believe the WP&Y had a few more outside framed engines than 3. 56,57,60,61,67,68,& 69 come to mind. Most of these were in service at the time of the US army takeover. Only 56,68 and one of the 10 wheelers had been scrapped.
An insite into White Pass thinking at the time the railroad was returned to them can be found on Bruce Pryor' WP&Y site.
[narrowmind.railfan.net]
While the army guys did beat the crap out of the equipment, we must remember that they were not there as preservationists. Their job in 1943 was to get the highway and pipeline built ASAP and keep the Japanese, who were already on Kiska and Attu, from invading Alaska and the Yukon.
They moved a lot of freight under some pretty difficult conditions during one of the worst Alaskan winters on record.
Weather the threat was real or not is something we can debate, but to them it was real! And they got it done.
And from what I have read the White Pass compensated.