This is a carryover year within the 1998-restyled LS1 generation; Chevrolet's kit documents base, Z28, and SS configurations rather than another major body revision.
The source shows how little exterior appearance alone can say in a carryover year; page copy should emphasize documented drivetrain, body style, and options rather than inventing a “1999-only” styling story.
The powertrain and identification notes below preserve configuration and model-year boundaries rather than treating every 1999 Camaro alike. Ratings use the measurement convention of their period, and visual cues are only a starting point: the VIN, factory labels, drivetrain identifiers, and surviving documentation should agree.