Sorry to bump this ancient thread but close what I am trying to find out... even my useless ancient post is kinda helpful. 
 
 I am trying to decode the VIN and find out why I have damn unique "C."  
 
  The VIN, I am trying to check is [REMOVED].
as far as I research... I believe. 
SF413 is chassis type (MK2 and MK3) but is it actually VIN? I don't think so.
BTW SA413 is MK1.
This VIN will contain some type of swift.
Not sure why MK1 have two size of engines.
XXXXX, AB515, SA413 FWD 4 cylinder 1324cc, 1984 - 1987 = MK1 
AA33S, AB33S, SA413, 4 cylinder 1298cc, 1986 - 1988 = MK1
AA34S, AB34S, SF413, 4 cylinder 1298cc, 1989 -1990 = MK2
AF34S = AWD (I don't know if it's true) A = FWD and F = AWD... maybe... 

AA35S, AB35S = [WRONG] MK3??? I guess?[WRONG] both 34 and 35 could be mk2 or mk3
[WRONG]I also suspect that B is Cultus (Japan spec) while A is non Japan spec.[/WRONG]
Again I don't see type engine... only chassis. 
SOURCE
http://www.teamswift.net/viewtopic.php?f=4&t=37842http://www.teamswift.net/viewtopic.php?f=36&t=45578https://www.youtube.com/watch?v=Nw45auSrfiU (read description)