From what I've read on the Chevelle site...the "L" *may* be an indicator that it's actually a real SS. I haven't read anything about the "L" meaning that it's a 375HP car...just what I've heard (and read) that's all
From this site (and it appears that this applies only to Baltimore cars)?
http://www.chevellestuff.com/index.htm
17 ~ unknown, suspect body cradle number for quality control
ST 69 13637 ~ 1969 Malibu Sport Coupe (286,162 units)
BAL ~ Body Assembly ~ Baltimore, Maryland
262249 BDY ~ Fisher Body data processing number (ID number on Body Broadcast Copy)
TR 786 ~ Med. Green Ransom Cloth/Coated Fabric (bench)
50 50 PNT ~ Dover White (lower-upper)
02D ~ Assembly Date ~ February, 4th week
B ~ unknown
<u>L ~ unknown but is being researched to see if it does indicate a SS car.</u>
211 ~ unknown
281 ~ trim inspection sequence number found on trim card.
8 ~ unknown