I would not run it on R1, like the F3, it might make it, but really typically binds the trucks.
Here's a page on couplers, weights, modifying for prototype height, etc:
Greg Elmassian web site on large scale trains and garden railroads, cigars, and computers
elmassian.com
Also, USAT locos are really easy to DCC the track pickups and motors, get a few JST connectors and can be done in 5 minutes, takes longer to remove shell, but lighting is another matter, pull out the bulbs and make all LED.
HJere's a page on USAT DCC installs, including the "quick and dirty" DCC install:
USAT DCC installation techniques
Greg