30 year old steering boxes are worn , there is an adjuster screw on the top of the steering box to reduce play often adjusting this will help, make sure it is adjusted withe the wheels pointed straight forward , it still will not be as tight as a rack & pinion though , the other option is to use a Firm Feel steering box
The negative camber either could be bad control arm bushings or incorrect adjustment , poor wheel alighment will affect the tightness of the steering to some degree
