I photographed most of the Amtrak heritage units (145, 184, 46, 108, 100, 156, 161, 406 and a 700 series P32-ACDM) when it ended up on the Lake Shore Boston section once. Most of the engineers were friendly and got a wave and/or horn toot. Luckily, I’ve been able to get all of these within maybe 10-15 miles of home. They either were on the Springfield-New Haven line which runs thru my town in central CT, or the Lake Shore which I can shoot in West Springfield if short on time.
Sadly, 140 and 160 the last P42 50th Anniversary unit never had some special cab signal equipment installed to run into Boston, so it is unlikely to come up this way.
I grew up in Central CT. My school was next to the Hartford - Willimantic Highland route. The line was NHs autoroute and used to see Fords going past. Around 68 I took a picture of the freight leaving Pratt-Whitney for the last time.