I messed with it a little, but found no way to get the front of the boiler separated from the chassis. It had to be a screw hidden under the 4 port nozzle casting modeled in the belly of the smokebox, but normal prying would not budge the nozzle. Finally, yesterday, I said "the hell with this" and just used excessive force on the nozzle and sure enough it popped off and revealed the elusive screw (and I damaged nothing).
Very evident this model was built back in the 80's and hoping to simplify and update the wiring and electronics during the restoration.
Fully equalized suspension, including custom built lead and trailing trucks, working reverse linkage, including moving the lever in the cab, fully detailed everything and built exactly to the photos I found in UP books of this road number loco. Lots of custom building and modifications to make this model correct, so it is worth saving.
So, I'm off to the races.
BH