By the way nice looking car. I must commend you on the nice condition and also noticed how clean your front wheels are. I think the rear suspension needs to be unloaded in order to get the shocks out of there. I would also recommend heavy duty shocks. The handling will be a little better. The ride will not be too harsh unless you put some harder compound, wider tires on the car.

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1990 190E 2.6
1996 Grand Voyager 3.3
1985 Mustang GT 5.0 5 SPD
1982 Suzuki GS 750T