Re: Factory Force Manual
Regardless of what they say on that site, it is not a factory manual.
From what I see, it is complied from several copyrighted publications.
2 stage fuel pump was discontinued in mid 92 model year, so your motor is 1990-92.
Furthermore, the 1090-91E models used the bright blue cd modules and coils, along with a terminal strip for wire harness connections. They also had an exposed voltage rectifier with 4 terminal screws.
The 91H-92c models changed to a switchbox with screws holding the wires, and very dark blue or black coils, along with a sealed (potted) voltage rectifier.
Later 92 models, along with the 93-94-95 models, used a sealed switchbox with wires hanging out of it, with bullet connectors on the end of the wires.
You may luck out and find a small white paper production line label under the cowl. Sometimes on the side of the head, the starter, the block, or flywheel. It might contain a model or a serial number.
Those are the only visual year indicators I know of.