Steves car is a GL. It's a 1/74 complianced car, compliance plate says GL. Looks like someone spent a bit of money on it in the past repainting it (original colour is metallic blue). Thats probably when it aquired its GT interior badges and shifter knob, probably from a deceased '73 GT.
Wheels Magazine of March 1973 has a 240K GT on the cover and a road test article. The 240K has GT badges, and is the same colour as the one in your photos. It also has a factory metal sunroof.
The specs list a mecahnical fuel pump (and it can be seen in the engine bay photos, so if there was an electric pump was it a dual pump system?), and a 4 speed gearbox.
I've heard from Lachlan, that production of the 240K sedan didn't start untill late 73 or early 74, which would explain why there weren't any 4 doors in the first load of K's to be sent here.
Wheels magazine says the 240K was a replacement for the 240C hardtop (In the Australia Market place), which implies to me that the 240C sedan was sold concurrently, untill it was replaced with the 260C, and I guess, the 240K sedan filled the 2.4 liter medium sedan void it left.
As for the GT's badged as GL's. That how I interpreted what was written in the Wheels article. "Badges on the car say 240K GT, but Nissan insists the car be sold in Australia as a GL". I guess the wording in the article is slightly inaccurate. Maybe "Future importations of 240K's will be GL's" would have been more correct.
It seems that the European market were sent the 240K's badged as GT's. I've seen alot of literature on ebay uk about the 240K GT and seen a few of them for sale on ebay over there too.
Attached is a photo of one of them (74 GT auto) from the www.datman.co.uk website (http://www.datman.co.uk/datsunworld/c110/c110.htm).
And Finally, regarding the boats that shipped the Datsuns to Australia. There was a 260C or 280C for sale on ebay Australia, Somewhere in the car the person had found a piece of paper that named the car transporter ship that the car was shipped over on. They put the name of the boat in the listing. I cant remember the name at the moment, but I did a google search, and found out that the ship from the 70's is still around today, sailing under a different name though, but still transporting cars.