edit: i feel shameful, i dont want to be known as the individual who posts 'facts' based solely on what i google. i shall practice refrain from now on.
FB/SA = 1st gen 1979-1985 (12a Carberated rotary, i think the 85 GSL might have come w/ a 13b)
FC = 2nd Gen 1986-1992 (13b FI rotary)
FD = 3rd Gen 1993-1995(i think that was the last US production year)(13b FI rotary)