As long as you're in there that far, you might consider increasing the caster in the car the simple way- by just adding two offset poly bushings in the upper front a-arms instead of reworking the a-arms with welding. This will increase caster from the max stock setting of -2.6 degrees to about -4 degrees. This vastly corrects the handling for actual driving at low cost and simple installation. Most vendors include instructions. You will need a wheel alignment, too. The 50-yr-old stock rubber bushings likely need replacement anyway.
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