My thoughts:
Exterior trim pieces
headlight bezels, grilles, chrome molding (rocker, windshield, trunk (if applicable). Possibly the sport mirrors, gas filler door? Taillights
Interior pieces
Console / console doors, panels, rallye gauges, sport steering wheels, trim pieces (particularly the dash and radio surrounds), kick panels, front bucket seat trim pieces from the Calais / Salon - these are hard to come by and are like gold for these cars.
Underhood
Maybe hard-to-find connectors and pieces, like wierdo elbows and such, fan shrouds, battery hold-downs?
Wheels
Rallye wheels from the Olds, Buicks, MCSS
Exterior trim pieces
headlight bezels, grilles, chrome molding (rocker, windshield, trunk (if applicable). Possibly the sport mirrors, gas filler door? Taillights
Interior pieces
Console / console doors, panels, rallye gauges, sport steering wheels, trim pieces (particularly the dash and radio surrounds), kick panels, front bucket seat trim pieces from the Calais / Salon - these are hard to come by and are like gold for these cars.
Underhood
Maybe hard-to-find connectors and pieces, like wierdo elbows and such, fan shrouds, battery hold-downs?
Wheels
Rallye wheels from the Olds, Buicks, MCSS