Some say that a T1 Duplex (of the production version) could reach 140 mph... And that's the type of T1 that's being built... I'm also against breaking the world record, simply because the T1's were only really known in the Eastern USA, and because they weren't so succesful...
The weight to power ratio would have to be severely tweaked to reach even 130. I may be a little biased because i absolutely detest our steam locomotive designs.