from the mirrored P-t-P:
From Protectoplate info:
Sold to Mrs A.W. Kirby on 5 June 1969
VIN: 124679N624455 69 Camaro, 8cyl Convertible, Norwood (OH) assembly seq num 624455. likely built on Wednesday, 2 April, 1969.
C = Carter Carburetor
4 = build month (April '69)
133 = option codes
Engine code T0313HB which decodes to a 350ci / 300 hp engine build in Tonawanda on March 13th. Your engine had a 4 bbl carb and typically had a Turbohydramatic behind it.
Trans code: Y9A31 = Turbo350, built on January 31, 1969.
Rear end code: BL 0117 G (3.07:1, 12 bolt, non posi assembled Jan 17th).. If the code is BI ... it's a 2.73.