I put tape on the steering wheel and steering column and then use the 20* angles on the end of my Joe's Racing alignment tool to mark both pieces of tape at 20*s left and 20*s right and center (do center first with the steering wheel straight ahead) along with greased slip plates under each front tire.
It's probably not exactly accurate, but it's as close as one can get without slip plates with turn gauges on them and very repeatable as you continue to make changes to the settings.
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Lance
1985 Monte Carlo SS Street Car
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