727 part # deciphering ('71 440 HP)

This '71 440 HP 727 has a "L" stamped after the part #.
What does the "L" mean?? I'm not finding any info about its meaning.

Also... Is it possible to tell which car model it was original to with the VIN stamping??

Its build date is 9/15/70



thanks for any info!!

all 727s of that vintage appear to have the "L" after the part number - its meaning ??

the part number & date would be correct for a '71 440 4bbl

but the partial VIN is for a '73 Hamtramck car & there were NO big-blocks at Hamtramck for '73

did some pics get mixed up

Thanks for the info...and good call on the pic mix up.
That VIN stamp is on a '73 340 727.
Here is the '71 440 VIN stamp...

that would've been a Charger: WM23U (Bee), WP29U (SE) or WS23U (R/T)

the '73 trans was a Duster or Barracuda

Thanks again for the help.
I'm cleaning out the garage and getting ready to sell off a bunch of stuff just trying to figure out what I've got here.