Someone will no better than I but the i am pretty sure the cab setup, hose bed and compartment space was differnt than a standard fdny pumper, also the pump itself was not a model fdny had ever used, there may have been an issue with a failed pump test as well but I can't rember if it was that unit, after 9/11 there were a few pumpers donated by other manufacturers, the 3 I can rember are this unit, the ferrara donated by New Orleans that did some fire house duty with a company (2??) for a short time and then was given to the training division, it was then driven to New Orleans after Katrina and left there as a gift, it was down there a few years and then it was refurbed by them and donated to a dept in Ny of NY after Sandy. Then there was the American La France, it did some time in the firehouses, it was then moved to govenors island when fdny took over fire protection duty, it still is out on the island and gets staffed when there are special events on the island as the island detail was cut do to budgets. If I recall none were to fdny spec however the American la France I believe was closest of the three to spec, from what I remember the Spartan/luverene was not close. The idea behind FDNY's very specific specs is logistics, having to stock parts for one style engine is much cheaper and requires knowledge of only one style, the donations that were not spec were sent to slow company's/training to minimize downtime and the cost associated with having to order parts.
Mack - I agree, the caisson unit is one uniit I hope is purchased, parked in a corner and never used.