Have you had the car for a while? How long has the tire been in that corner of the car? Maybe there's a front end problem and someone rotated the tires. Maybe those wheels were on another car until recently.

There are some guidelines in this thread on what ride height is and should be -

http://www.peachparts.com/shopforum/showthread.php?t=124073

Measure from the center of the wheel to the fender lip so you can compare ride height among 126s with different diameter wheels.

Sixto
87 300D