I have seen photos of them with swapped gallery cab cars. I would like to see these formations in the game (scenario designer and maybe swap out in timetable). Did successfully couple when experimenting in Sand Patch Grade. The HEP worked, brakes, throttle, no real issue there. MP36PH-3C with older gallery cab cars https://commons.wikimedia.org/wiki/File:Caltrain-927.jpg F40PH-2CAT with newer gallery cab cars https://commons.wikimedia.org/wiki/File:Caltrain_Bombardier_set_(3293833493).jpg
I think the MP36PH-3C looks great with the older Gallery cars! Kinda reminds me of the old stainless steel streamliner passenger trains.