Fixing up the old Fuji and saw this. Sorry I’m late getting the information but maybe it will help or confirm your data. Its original except replaced saddle and I have that. I didn’t see anything else on the derailleur but will be happy to look if needed. T-mar you helped on a centurion, and if I understand this is a March 84 bike.
Boulevard
valite 616
#SC419004
derailleurs suntour ar
power thumb shifter
crank S 170 GC 8

Was this an entry level bike?