For almost 2 years, we're wondering why are rear wheels have so negative camber and toe so positive, but this week, we found why it has been that way... The suspect was guilty as charged but we couldn't find out before because we didn't have spare rear axle and because car was lowered and it was crashed from behind 20 years ago..
Rear axle was taken from the car and put next to spare one...

my car had to be crushed by the train or by the truck!
Here's the pictures:
Right outer side of trailing arm support..
...no difference.
Right inner side of trailing arm support. (next to differential)
difference of one half of an inch !!
Left outer side of trailing arm support...
..almost no difference.
Inner side of the left trailing arm support...
Difference is little smaller than on the right side...
That's why did I have to change rear tyres every 1000 miles
Fuel pump was changed also.. godbye K-Jet, hello L-Jet fuelpump! Now it's everything changed to LE-Jetronic and engine is now showing it's full potential.
Everrything was dissasembled so diff was on inspection also... I was complaining that LSD was working only to one side. And we found why was that so..
...only one bolt was keeping cower wher it should be.
and oil was silver color.
3.45 diff ratio was taken out and 4.10 is fitted.
I can say it is just as it should be and nothing else!
Rear side has been lowered little more

, and now it is equally lowered front and rear.
After the work was done, we adjust toe and camber and only thing that I can say is Why the f**k didn't we do it 2 years ago!
Rear wheels are following front ones and there is no rear wheel steer effect anymore! Handling has been improved more than I have expected.
After we fitted 4.10 diff, we managed to fix at least 2 problems.
1. spedeo is accurate now
2. engine found 20 lost BHP
SORRY FOR THE BIG POST!