74 decode help anyone?

['Cuda Hunter]

26  L2  057
?54 M51 J52 M21 N76 V5X
V1X  U B41  c16 C56 C11
JY6 A6X9  000  110 159775
E44 D34 BH26G4  27XXXX

I don't have a 72 and up book. 
There's a couple codes I don't know.

[74challenger03]

Hope this helps   http://www.mymopar.com/index.php?pid=17

[Jamiez]

You have it has BH26...that shouldn't exist?  Sure it's not BH23?  Also M51?  A sunroof...on a 74? I assumed the ? code was G54 as that makes sense for where it is on the tag

Code   Description
E44   318-2 Barrel

D34   TorqueFlite Automatic Transmission

BH23   
B = Plymouth Barracuda
H = High
23 = 2 door hard top

G42   
G = 318 150HP(net) or 170HP(net) 1-2BBL 8 CYL
4 = 1974
2 = Dodge Main, Hamtramck, MI, USA
7XXXXX   Sequence Number '7XXXXX'

JY6   Paint Code: Golden Haze Metallic

A6X9   
Trim Grade/Style/Color
A = A Class
6 = Vinyl Bucket Seats
X9 = Black

000   Upper Door Frame: Full Door Panel

110   Date Built: 1 / 10 / 1974

159775   Order Number: 159775

V1X   Roof Type OR Color:  Full Vinyl Top - Black

U   Built to Specifications for USA Order

B41   Front Disc Brakes Some Yrs. Power

C16   Console w/ Buckets

C56   Bucket Seats 1972 up

C11   Unknown At This Time

G54   Left Hand Outside Mirror - Remote / Chrome

M51   Power Sunroof w/ Vinyl Top

J52   Inside Hood Release

M21   Roof Drip Rail Moldings

N76   Coolant Recovery System

V5X   Black - Mouldings - Protective Insert Body Side

26   26 in. Radiator

L2   Unknown At This Time

057   Unknown At This Time

['Cuda Hunter]

Thanks guys.

I can't see a list of options on the online decoder.

I think the M51 and ?54 are wrong.

In the order of the tag it's not right either.

Any clue as to what the 51 and 54 could be for. 
The car does not have a sunroof.

[Jamiez]

If it was G51 it would be LH O/S Mirror Manual Chrome
If it was G62 instead of J52 it would be RH O/S Mirror Manual Chrome

That's in the right area of the tag for Mirror codes.

['Cuda Hunter]

The car that I am looking at does not have mirrors on either side. 
Could be from the repaint though.

[74challenger03]

Im impressed Jamiez

[Culvers]

26  L2  057
?54 M51 J52 M21 N76 V5X
V1X  U B41  c16 C56 C11
JY6 A6X9  000  110 159775
E44 D34 BH26G4  27XXXX

26  L2  057
G54 H51 J52 M21 N76 V5X
V1X  U B41  c16 C56 G11
JY6 A6X9  000  110 159775
E44 D34 BH26G4  27XXXX

['Cuda Hunter]

Now that makes sense.
thanks