Using an online one:
Code Description
E44 318-2 Barrel
D34 TorqueFlite Automatic Transmission
JH23
J = Dodge Challenger
H = High
23 = 2 Door Hardtop
G4B
G = 318 150HP(net) or 170HP(net) 1-2BBL 8 CYL
4 = 1974
B = Dodge Main, Hamtramck, MI, USA
XXXXXX Sequence Number 'XXXXXX'
KG8 Paint Code: Unknown At This Time
A666 Trim Grade/Style/Color
A = A Class
6 = Vinyl Bucket Seats
66 = Unknown
000 Upper Door Frame: Full Door Panel
109 Date Built: 1 / 09 / 1974
298458 Order Number: 298458
V1W Roof Type OR Color: Full Vinyl Top - White
U Built to Specifications for USA Order
B41 Front Disc Brakes Some Yrs. Power
C16 Console w/ Buckets
C56 Bucket Seats 1972 up
G11 Tinted Glass All
G55 Unknown At This Time
G66 Unknown At This Time
G75 Unknown At This Time
H51 Single Air /w Heater
J35 Wheel Housing Liners
L31 Hood / Fender Mount Turn Signal
M21 Roof Drip Rail Moldings
M26 Wheel Lip Molding
N76 Coolant Recovery System
R35 AM / FM Multiplex Sterio
V5X Black - Mouldings - Protective Insert Body Side
26 26 in. Radiator
L2 Unknown At This Time
896 Unknown At This Time
I'm guessing A6666 and KG8 are not the correct codes. I'm not aware of a 72+ color that starts with K