You didn't post the full VIN but thats okay....I assume this is a 340 car from the engine code (E55, it was typo'ed at L55)
Code Description
E55 340-4 Barrel 69-73
D21 Heavy Duty 4-Speed Manual Transmission
BS23 B = Plymouth Barracuda
S = Special
23 = 2 Door Hardtop
H1B H = 340 275HP 1-4BBL 8 CYL
1 = 1971
B = Dodge Main, Hamtramck, MI, USA
EV2 Paint Code: Hemi Orange / Tor-Red Irid
H6X9 Trim Grade/Style/Color
H = High
6 = Vinyl Bucket Seats
X9 = Black
000 Upper Door Frame: Full Door Panel
315 Date Built: 3 / 15 / 1971
030315 Order Number: 030315
EV2 Roof Type OR Color: Hemi Orange / Tor-Red Irid
U Built to Specifications for USA Order
A31 3.91:High Preformence Axle Package
C55 Bucket Seats
G33 Left Hand Outside Mirror - Manual / Chrome
J45 Hood Tie Down Pins
J54 Sport Hood 70-1
M21 Roof Drip Rail Moldings
M25 Wide Sill Molding
M31 Belt & Hood Molding
M88 Quater Panel Tape Treatment
N41 Dual Exhaust w/o Tips
N42 Chrome Duel Exhaust Tips
R11 Music Master Radio AM
V6X Black Longitude Sports Stripe
26 26 in. Radiator
EN2 End of Codes Assembly Line 2