Yes, only one "dedicated" place. My comment was if "all else fails" it would be better than rubber hose to maybe mount it lower.
Here are the instructions for adjustment.
http://chevy.oldcarmanualproject.com/shop/1948_51truck/51ctsm0508.htm
http://chevy.oldcarmanualproject.com/shop/1948_51truck/51ctsm0509.htm


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