If you have the litle glow speaker that gets red when the glow plugs are on, you have the standard glow. Mine is a march 1981 build and I have all of what I call the "3B" stuff on my 2B.
In 1982, toyota stopped making the 2B and all rigs came with the 3B and h55 (with some random exceptions). They used the JDM rigs to play with newer technology, but wanted to use up old stuff before moving to the new stuff. A great example is the mixtures of engines and transmission in 1974 fj40s here in the states....
It makes sense that your 11/80s still have the "older" setup as they were probably getting rid of it as all JDM rigs in M.Y. 1981 eventually went to superglow and left side rad hoses (from the driver's seat).
Just to confirm, are you talking about your rad inlet being on the left when in the driver's seat or from in front in wrenching position? If you have a driver's left rad top hose on your rad and a standard glow, that is definitely a strange bird as that means they are using old glow system, but new cooling system.
For those interested, they moved the rad inlet to make room for the more common power steering on the 1981 BJ42s, BJ60s and other 3b equipped rigs. The old water pumps caused some interference issues with the power steering pumps.