Let me explain in detail the whole story.

When standing at the back of the car looking at the back. If you compair the left side wheel (passenger side)to the right side wheel (driver's side) at the back, I noticed the passenger side is normally mounted.
The driver's side the wheel is standing out of the guard about 1cm. The rubbing is when I go through dips in the road.
There is no play sideways it is only up and down.
When looking at the driver's side tyre I noticed the way it is positioned it is traveling into the guard and then the guard is almost cutting the tyre's side because it is too far out of the arch.(The 185 fatty tyre is too large for the guard)
My dad said they were designed like this because all cars carry most of their live only a driver.
When the diff is positioned a little to the driver's side it is to help with the balance and handling.
I do not want to change this.
I know I must retention the leafs but I still want to keep the car low at the back.
The rims are definately not the problem.
Must I retention the leaf springs and build out the guards at the back?
If I have a pasanger at the back on the passenger's side it only rubs on the drivers side.
I do not want to even think what will happen if I put someone on the drivers side in the back.
The guard will cut my tyre to shreds and even rip out a piece of the body.

if I retention the leafs, will it not make them stiffer and not make the tyre travel so deep into the guard solving the problem?