identity of Ex- u.p. RR Locomotive.

[T]

Is anyone here able to identify this EX-u.p. , NEE- RR ?   Locomotive? 

>https://www.youtube.com/watch?v=N_bxHr-djzE&ab_channel=PrecisionLocomotive<

Tom

[big train james]

UPY 2107, nee UP 964, nee MP 3504.

A gp50, rebuilt by MPI in 2006, apparently.

Based on information found on RRpicturearchives.net and the Precision website.

Jim