Rear Suspension Question
 

Hi all... Newby here from the Uk, hoping to find some info on my truck. Apologies if this is in the wrong section, it's my first time here. I have a 2003 2.5tdi, single cab, 2wd with a limited slip diff, The odd thing is, all the other Rangers I've looked at have the rear leaf springs on the outside of the frame rails,but mine are underneath the frame rails. I've been searching the internet and so far haven't seen another Ranger or Mazda B2500 with the same setup as mine. Also I believe that the rear body is normally held on with six bolts going down through the bed under the plastic liner... mine doesn't have these bolts but is fixed by shorter nuts and bolts underneath. Entering the VIN number into a decoder hasn't helped either and the sticker usually found on the door is missing too. Little bit confused... I'm hoping someone on here will have some idea of what truck I've got.