Last Frisco diesel to be dipped in green (BN)?

Brian, I have seen a photo dated 7/4/1991 of an Amtrak GP7 that was purchased from the Frisco. It was patched, but still had O&W.

 

If you're talking about this one: http://www.rrpicturearchives.net/showPicture.aspx?id=804588 then I kind of question the date. It says it's in Chicago but has Amtrak Phase I and what looks like rainbow equipment behind it. My mistake on the red and white versus orange and white. I run my own fictional line and I just have a lot of run through power. I have a Frisco unit but didn't know if any existed in 1985 where I set my layout. I may have my own "patch" on the Frisco unit.

 

I just checked and it looks like most were repainted yellow and green by the late 70s/early 80s.