Thanks for the information…I wasn’t sure about the two tone grey, though I have seen pictures of heavyweight cars with silver Challenger script in that scheme, and a picture of UP Pacific Forum (Budd 10r-6br) in two tone grey, though not assigned to the Challenger
I think you will find it rewarding reading. I am frequently surprised by just how much UP information is on this site. Here’s the lead page for the UP info:
The links to the paint schemes and the “total” UP information were fabulous…able to pick up a lot from it…never really explored a website like Utah Rails, since my interest and layout abuilding will be a cross between LIRR/PRR New York and maybe(??) Chicago, so UP is a small player in the thing, but have so many cars, wanted one floating around for the CHALLENGER in the pool.