Vehicle Identification Example:
-First digit is GM Division: 1 = Chevrolet
-Second digit is model: P = Sport, Rally Sport, Z28, S = Berlinetta
-Digits 3 & 4 are body type: 87 = 2dr. coupe
-Fifth digit is engine code: A = 231ci V6, H = 305ci V8, J = 267ci V8, K = 229ci V6, L = 350ci V8.
-Sixth digit is model year: A = 1980
-Seventh digit is N for Norwood assembly, L for Van Nuys.
-Last six digits increased one with each car built at each plant.
1980 Berlinetta -
Included Custom Interior, bright upper and lower grille, bright windshield and rear window moldings, dual pin stripe treatment, body color sport mirrors (D35), argent applique on rear panel, specific trim and either wire wheel covers (standard) or color-keyed aluminum wheels (N90, 14 x 7") (optional). Amberlite insulation blankets included in doors, rear quarters, roof/sail panels, behind rear seat, under package tray and under carpeting (RPO Z54 interior decor/quiet sound). Option U05 dual horns and U14 Special Instrumentation were also standard equipment.
If you want more info, this is were i got that stuff http://www.nastyz28.com/camaro/camaro80.php