Vin# Decode

Hope someone can set me straight. I had a 73 340 Duster I bought in 1982. Here is the Vin # VS29H38192120 I am stumped by the info I get when trying to decode it online. Went to several online sites, and the all say "Export" for where it was assembled.
The car was bought (by me) out in Lompoc, California in 1982. I was told that it might just be a miss print on the "8" should have been a "B" But both the title and the dash vin are the same. the Decoder on this site just says "invalid" for Vehicle Assmbly Plant. Can anyone explain any further? Thanks

MyDuster340 boxburnKCIR (Small).jpg