Regarding the Amtrak FL-9's, they did go west to NFL on #281 and #283 a few times when F-40's were not available. The FL-9's also made a few trips to Montreal (Central Station), with special permision from CNR, account being restricted to certain tracks in Central Station (could not go on tracks that had overhead catenary and could not run through to opening of tunnel at north end of station account turnouts, to make a reverse move to the "pocket track" outside the station, as the F-40's did on arrival).
Early in the 70's they were sent to Boise,ID for rebuilding. They were sent west on #49 (dead in tow), then forwarded to Boise. When they came back from Boise, they went Chicago-Detroit-Buffalo-Albany, or Chicago-Cleveland-Buffalo-Albany, and there is an old TRAINS magazine from the 70's (1977???) that shows a rebuilt FL-9 leading #64 out of Detroit. Some came thru Detroit, but the others came east on #48, sometimes leading, some in trail. I was working the 3:59 PM Albany "Depot" job at the time.
I don't remember any FL-9's being sent to New Haven for servicing from Albany, the FL-9's Amtrak used before rebuilding, were sent (and stationed) to the old NYC Harmon Electric Shops. Amtrak used E-8's before the rebuilt FL-9's replaced them. When the Amtrak shop opened in Rensselaer in 1978 (for the Rohr Turbos), they also started working on the FL-9's.
Toward the end of the Amtrak FL-9 era, we did send a "back-to-back" set to NYP for protection of Empire trains, also in the winter we sent one to NFL for "protection". Amtrak FL-9's operated into New York GCT, and also into New York Penn Station at the start of service in 1991. The FL-9's, as far as my knowledge did not go to Toronto on 63, but P-32's have.
I was the Conductor on #283 (Sat, 4/5/91?), the last NYG-NFL train the on last day of intercity service at GCT, and the power was an FL-9 (don't remember eng #), NYG-ALB.