Figuring Out Your 1966 Ford Mustang's DNA - VIN Code & Data Plate Decoding Made Easy

Figuring Out Your 1966 Ford Mustang's DNA - VIN Code & Data Plate Decoding Made Easy

Posted by D. Brian Smith on Jul 11th 2024

1966-Mustang-blk-conv-34-frontAll 1966 Ford Mustangs rolled off the Ford assembly lines complete with a Vehicle Identification Number and a Data Plate. The VIN is stamped atop the driver's side engine bay wall. While the data plate, which is riveted on the driver's side doorjamb also contains the VIN. These two items provide all the details of how the Mustang was first manufactured - the Mustang's DNA if you will.

Decoding a 1966 Mustang Raven Black GT Convertible

1966 Mustang conv data plate 1K

In honor of Henry Ford, the originator of the automotive assembly line, let's decode the data plate and VIN on a racy Raven Black (code A) 1966 Mustang (code 6 in the VIN for model year 1966) GT convertible with a luxury interior (code 76B). When those Ford Model Ts started rolling off the Ford assembly line in the early 1900's in Dearborn, Michigan, they all wore jet black paint.

VIN engine bay sizedAbove: The VIN code is also stamped atop the driver's side inner fender wall or engine bay wall, running parallel to the driver's side front fender.

Body Style Code
Code Description Code Description Code Description
63AFastback w/ Standard Int. 63BFastback w/ Luxury Int. **************************************
65ACoupe w/ Standard Interior 65BCoupe w/ Luxury Interior 65CCoupe w/ Bench Seat
76AConvertible w/ Standard Int. 76BConvertible w/ Luxury Int. 76CConvertible w/ Bench Seat

1966 Mustang front top up 1K

Above: All of the GT badging, fog lights, and Wimbledon White rocker striping is evident on the Raven Black (code A) over luxury black (code 66) Pony Interior upholstery-equipped pony car.

1966 Mustang Exterior Paint Hues

1966 Mustang paint chips

Above: Notice there are more paint colors on the chip chart than there are paint codes. The chart indicates that 1965 spring colors are included.

Exterior Paint Code
Code Description Code Description Code Description
A or 9ARaven Black F or 3FArcadian Blue GSapphire Blue
H or 5HSahara Beige K or 3KNightmist Blue M or 5MWimbledon White
P or 4PAntique Bronze Q or 4QBrittany Blue RIvy Green Metallic
T or 5TCandy Apple Red U or U9Tahoe Turquoise VEmberglo
XVintage Burgundy YSilver Blue ZSauterne Gold
4 or 4FSilver Frost 5 or 5ASignalflare Red 8Springtime Yellow

1966 Mustang black pony int 1K

Above: The black beauty is loaded to the gills with a black luxury Pony interior (code 66), factory AC unit, a four-speed manual trans (code 5), and front disc brakes (included with the GT package).

Interior Trim Code
Code Description Code Description
22Blue w/ Blue Trim 25Dark Red w/ Red Trim
26Black w/ Black Trim 27Aqua w/ Aqua Trim
D2Parchment w/ Blue Trim D3Parchment w/ Burgundy Trim
D4Parchment w/ Emberglo Trim D6Parchment w/ Black Trim
D7Parchment w/ Aqua Trim D8Parchment w/ Ivy Gold Trim
D9Parchment w/ Palomino Trim 62Blue and White, Luxury
64Emberglo and Parchment, Luxury 65Red Luxury
66Black Luxury 67Aqua and White, Luxury
68Ivy Gold and White, Luxury F2Parchment w/ Blue Trim, Luxury
F3Parchment w/ Burgundy Trim, Luxury F4Parchment w/ Emberglo Trim, Luxury
F6Parchment w/ Black Trim, Luxury F7Parchment w/ Aqua Trim, Luxury
F8Parchment w/ Ivy Gold Trim, Luxury F9Parchment w/ Palomino Trim, Luxury
32Blue, Bench 35Red, Bench
36Black, Bench C2Parchment w/ Blue Trim, Bench
C3Parchment w/ Burgundy Trim, Bench C4Parchment w/ Emberglo Trim, Bench
C6Parchment w/ Black Trim, Bench C7Parchment w/ Aqua Trim, Bench
C8Parchment w/ Ivy Gold Trim, Bench C9Parchment w/ Palomino Trim, Bench

1966 Mustang back seat 1K

Date Code
Code Description Code Description Code Description
xxADay|January xxBDay|February xxCDay|March
xxDDay|April xxEDay|May xxFDay|June
xxGDay|July xxHDay|August xxJDay|September
xxKDay|October xxLDay|November xxMDay|December

Above: According to the Date Code chart above, this Mustang was built on September 03, 1966. The D.S.O. or District Sales Office where it was first sold is Pittsburgh, PA (code 14). Below: Since the Mustang is an A-code GT, she's equipped with a Rally-Pac clock and tachometer instrument pack, in which the tach reads to 6,000 RPMs. If the Mustang had the solid-lifter K-code engine, the tachometer would read to 8,000 RPMs.

1966 Mustang Rally Pac 1K

District (DSO) Code
Code Description Code Description Code Description
11Boston 12Buffalo 13New York
14Pittsburgh 15Newark 21Atlanta
22Charlotte 23Philadelphia 24Jacksonville
25Richmond 26Washington 31Cincinnati
32Cleveland 33Detroit 34Indianapolis
35Lansing 28/36Louisville 41Chicago
42Fargo 43Rockford 44Twin Cities
45Davenport 51Denver 52Des Moines
53Kansas City 54Omaha 55St. Louis
61Dallas 62Houston 63Memphis
64New Orleans 65Oklahoma City 71Los Angeles
72San Jose 73Salt Lake City 74Seattle
81Ford of Canada 83Government 84Home Office Reserve
85American Red Cross 89Transportation Services 90-99Export

1966 Mustang rear axle 1K

Above: As the chart just below indicates, this 1966 Mustang has a 3.00:1 standard differential (code 1).

Axle Ratio Code
Code Description Code Description
13.00:1 Standard Differential 22.83:1 Standard Differential
33.20:1 Standard Differential 43.25:1 Standard Differential
53.50:1 Standard Differential 62.80:1 Standard Differential
83.89:1 Standard Differential A3.00:1 Locking Differential
C3.20:1 Locking Differential D3.25:1 Locking Differential
E3.50:1 Locking Differential F2.80:1 Locking Differential
H3.89:1 Locking Differential L2.83:1 Locking Differential

1966 Mustang front 1K

Transmission Code
Code Description
1 3 Speed Manual
5 4 Speed Manual
6 C-4 Automatic

1966 Mustang cockpit

Model Year
Code Description
6 1966

1966 Mustang side rear 1K

Above: This baby was born at Ford's home in Dearborn, Michigan (code F).

Assembly Plant
Code Description
F Dearborn
R San Jose
T Metuchen
Body Serial Code
Code Description
07 Hardtop
08 Convertible
09 Fastback

1966 Mustang engine 1K

Above: The pony car has its born with 289-4V, 225-horsepower V8 engine (code A) and four-speed manual transmission (code 5).

Engine Code
Code Description
A 289-4V
C 289-2V
K 289-4V Hi-Po
T 200-1V

1966 Mustang top up rear 1K

If a vintage pony car has superb body and paintwork, there's a great chance that a black exterior paint scheme is going to look classy, timeless, and epic, as is the case with this well sorted 1966 Mustang GT convertible. The Mustang served as the perfect specimen for decoding her VIN and data plate. Parts Unlimited Interiors wishes to thank Mecum Auctions for permitting us to publish these photos.

Consecutive Unit Number

Each plant started each year with number 100,001. The Falcon, Fairlane, and Mustang, were all numbered together, regardless of model or type.

Parts Unlimited Interiors for Mustang Cockpit Components

There's a growing paddock of Mustang pony car interior components available at the Parts Unlimited Interiors website. Now that you know your 1966 Ford Mustang's DNA, paying several visits to PUI could well pay dividends for your pony car's cockpit.