Rear Leaf Springs vs Frame Issues

Hi all,
I am new to the tacomaworld. I just got a 1st gen tacoma 4x4 that has been in a wreck. Front end of the truck needs some work both cosmetic and may be a tad bit of frame work. I think it took a dive into a ditch.
Anyways my main concern is about the rear of the truck. It leans to the passenger side about two inches. Since the lean is to the passenger side, I assume it cannot be the notorious taco lean??? The spring arches on either side are a little uneven. But i am not sure it is enough to cause a two inch lean. Can you guys please help me with some tips on how to distinguish between a suspension lean and a frame imperfection.
I thought this case is specific enough to create a new thread. I apologize if its not.
Thank you.

 

Pictures would be a real big help

You measuring this on a flat concrete floor??

No damage seen under the rear of the truck ??

Is one of the spring hangers pushed up into the frame enough to cause it to sit crooked

Frame twisted enough on one side ??

Really hard call to make unseen

Both rear tires the same size I have seen strange combinations of wheels and tires on vehicles being sold.

As long as the tire holds air it is good enough

 

I parked the truck at my friends place since he has more space. So wen i go there i will take some picture and post here.
I am not sure how to measure it. It would be a great help if you guys have any pointers as to how.
There is no visible damage what so ever under the truck.
When i measure from the frame to the ground on either side there's a two inch difference. But not sure how to tell if its all suspension or if the frame has something to do with it too. Oh and i measured from the frame to the leaf spring bottom out bumper and i see a difference of little over an inch there.
The tire and wheel sizes are the same on all 4 corners.


Thanks alot for your input. I will post some pics as soon as i can.

 

Carefully inspect each leaf spring on the passenger side. One could be broken .