Looks like a WW2 to me. It appears that they mounted a passenger seat frame in the drivers position. Are you going to restore it? That Buick V6 was probably one of the best conversions for a jeep. The heavy flywheel made them idle along really well. If you cleaned it up, brought it back to military configuration on the outside and left the V6 you would have a little hotrod. Looks like they gave it a lift under the front spring shackles. It is a little hard to tell, but it looks like they kept the stock steering, so the angle of your wheel is where it goes. In addition to the V6, they would usually put a saginaw steering box hung off the left front frame rail. Looks like the body is pretty solid. This is a good starter WW2 jeep. You have lots of options.
I am going to get a photo of the steering box as it sits against the frame at present. I will post it. I also found out when measuring the seat to steering wheel that the driver's seat frame looked like it had been cut and welded and may not be the correct frame for the drive's side?
The previous owner had made steel half doors and a elongated passenger seat which I will also post pictures of.
I am thinking about keeping the V6 and making everything alse WW2 GPW. I like the power this jeep has and it would be a nice WW2 hot rod GPW.
Here are my measurements against those I received in this thread so far.
Top of gas tank to lowest part of steering wheel..............My GPW is 11.25 inches ....in this thread the answers I got show 12.50 inches
Side tube of seat frame to lowest part of steering wheel...My GPW is 9.50 inches.....in this thread the answers I got show 11.00 inches
Seat frame metal bottom for cushion to steering wheel.....My GPW is 10.50 inches......in this thread the answers I got show 11 7/8 inches
There appears to be an overall difference of around 1.50 inches closer to the seat than found on the stock 41-45 GPW.