RPO numbers

You could try to find the build sheet, most of the time on the C3 they hide them on top of the gas tank, that means dropping the tank and having a look. Keep in mind they are not in the best of shape.

1969 Corvette Options RPO# DESCRIPTION QUANTITY $ RETAIL 19437 Base Corvette Sport Coupe 22,129 4,781 19467 Base Corvette Convertible 16,633 4,438 n/a Genuine Leather Seats 3,729 79 A01 Soft Ray Tinted Glass, all windows 31,270 16 A31 Power Windows 9,816 63 A82 Headrests 38,762 17 A85 Custom Shoulder Belts (std with Coupe) 600 42 C07 Auxillary Hardtop (convertible only) 7,878 252 C08 Vinyl Covering (for Auxillary Hardtop) 3,266 57 C50 Rear Window Defroster 2,485 32 C60 Air Conditioning 11,859 428 F41 Special Front and Rear Suspension 1,661 36 G81 Positraction Rear Axle 36,965 46 J50 Power Brakes 16,876 42 J56 Special Heavy Duty Brakes 115 384 K05 Engine Block Heater 824 10 K66 Transistor Ignition System 5,702 81 L36 427ci, 390hp Engine 10,531 221 L46 350ci, 350hp Engine 12,846 131 L68 427ci, 400hp Engine 2,072 326 L71 427ci, 435hp Engine 2,722 437 L88 427ci, 430hp Engine 116 1,032 L89 Aluminum Cylinder Heads with L71 Engine 390 832 MA6 Heavy Duty Clutch 102 79 M20 4-Speed Manual Transmission 16,507 184 M21 4-Speed Manual Transmission, close ratio 13,741 184 M22 4-Speed Manual Transmission, close ratio, hvy dty 101 290 M40 Turbo Hydra-Matic Automatic Transmission 8,161 221 N14 Side Mount Exhaust System 4,355 147 N37 Tilt-Telescopic Steering Column 10,325 84 N40 Power Steering 22,866 105 P02 Deluxe Wheel Covers 8,073 57 PT6 F70x15 Red Stripe Tires, Nylon 5,210 31 PT7 F70x15 White Stripe Tires, Nylon 21,379 31 PU9 F70x15 White Letter Tires, Nylon 2,398 33 TJ2 Front Fender Louver Trim 11,962 21 UA6 Alarm System 12,436 26 U15 Speed Warning Indicator 3,561 11 U69 AM-FM Radio 33,871 172 U79 AM-FM Stereo Radio 4,114 278 ZL1 Special L88 (aluminum block) 2 4,718

anyway heres more info.....www.69corvette.com/69specs.html if the car is relatively untouched,Examine the top of the tank to see if the original build sheet is present. It is commonly found on the upper left side of the tank.