The Big Boy should run on any 'Code' of track 75, 83 or 100. It's the radius of the bends that you have to watch out for as it is a long loco.
The Big Boy can be used on curved track with a minimum radius of 360 mm / 14-3/16", but larger radius curves of 20" or greater are recommended due to overhang.
The Big Boy can be used on curved track with a minimum radius of 360 mm / 14-3/16", but larger radius curves of 20" or greater are recommended due to overhang.