Help Decode my Fender Tag???

Some of you may already know from my "Welcome Wagon" thread, but I just purchased a 1974 Dart Swinger project car. I have been trying to deode my fender tag and have most of the codes figured. I was wondering if you guys (and gals) could help me out with the rest. Here is what I have so far:

R11 - AM Radio
V5X - Black Body Side Moldings
L1 - ?
317 - ?
L31 - Fender Mount Turn Signal
M21 - Roof Drip Rail Moldings
M25 - Wide Sill Molding
M26 - Wheel Lip Molding
M38 - Deck Lid Finish Panel Moldings
N76 - Coolant Recovery System
VIL - Full Vinyl Top - Champagne
U - Built to USA Specs
C15 - Sound Insulation Package
G11 - Tinted Glass
C52 - Bench Seat
H51 - Single Air Conditioner With Heat
FE5 - Paint Code: Rally Red
E2L3 - ?
000 - Full Door Panel
425 - Build Date: 4-25-74
509285 - Order # 509285
E24 - 225 1 Barrel /6
D34 - ?
LH23 - L=Dart H=High Price Class 23=2 Door Hard Top
C4B - C=225 /6 4=1974 B=Hamtramk, Mi USA

I found all of these by searching the web, so some of them my be incorrect. If so, please let me know.