Hey, Super Blue 72! (That pic of the scale car in front of the 'iceberg' STILL blows my mind and eyes. Man, I LOVE the rake on that car!
Yes, thanks entirely to this site, I was abale to decode the fender tag and I will try and paste what I came up with, below. My wife is soooo jealous. I mean, the GTO Forums are great but, she has yet to find links to mfr decoder websites the way I did here in CC.com!
As you'll see, there was only one I wasn't able to decipher: the numeral "1" that results in "1 - Unknown At This Time"
I tried just a lowercase "L" (e.g., 'l') and anything else I could think of that is close in appearance to a "1" but, no doubt about it, that is a numeral "1" sitting in the 3rd row DOWN and the 2nd "column" OVER from the LEFT, all by its lonesome. Wierd.
Anyhoo, according to
http://www.stockmopar.com/mopar-fender-tag-decoder.php , here's what I came up with (how'd I do?):
E55 340-4 Barrel 69-73
D21 Heavy Duty 4-Speed Manual Transmission
JH23
J = Dodge Challenger
H = High
23 = 2 Door Hardtop
H3B
H = 340 240HP(net) 1-4BBL 8 CYL (*Disclaimer: as I mentioned initially, the car now has a 440 Magnum out of '70 GTX in it)
3 = 1973
B = B = Dodge Main, Hamtramck, MI, USA
1973 = 27,930
Note: All models were V8-powered hardtops
181939 Sequence Number '181939'
JA5 Paint Code: Unknown At This Time
http://en.wikipedia.org/wiki/Dodge_Challenger#19731973
Dark Silver Metallic- JA5 (original color?)
Dark Green Metallic- JF8 (present day color)
A6X9 Trim Grade/Style/Color
A = A Class
6 = Vinyl Bucket Seats
X9 = Black
000 Upper Door Frame: Full Door Panel
A18 Date Built: 10 / 18 / 1972
E31315 Order Number: E31315
V1X Roof Type OR Color: Full Vinyl Top - Black
1 Unknown At This Time
A57 Challenger / Charger - Ralleye
B41 Front Disc Brakes Some Yrs. Power
C56 Bucket Seats 1972 up
J52 Inside Hood Release
J54 Hood Insulating Pad
M08 Simluated Door / Fender Louvers
M21 Roof Drip Rail Moldings
N41 Duel Exhaust w/o Tips
N42 Chrome Duel Exhaust Tips
N85 Tachometer
R11 Music Master Radio AM
V6X Black Longitude Sports Stripe
26 26 in. Radiator
EN2 End of Codes Assembly Line 2