Try replacing your steering column bushing, and lubricating the universal joints as well. The steel replacement bushing that I bought here at Pelican installed really easily and dramatically lightened my steering.
I knew something was wrong when I drove my friend's SC and his steering was so much lighter I thought he might have power steering.
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Mark Szabo
1986 911 Targa 3.2
1987 Escort 5-speed 1.9
RIP
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