If there is really 2 degrees difference in caster the car should noticably pull to the side of lower caster.

Before you do anything to the suspension, find a set of good wheels and tires and try them out. The suspension on the early 107 was designed in 1968 for the 114/115 body and is really a POS for a performance car. In 86 the suspension was redeigned to bring the caster to over 9 degrees and a better tracking car was the result.

See how it does with the proper 205/70 14 tires/wheels it was designed for. The early 107 car will not like oversize tires and wheels and it really hates wheels with the wrong offset!

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Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician