steering slop

[Stockcarwilly]

Ok guys I need some help, my 70 c10 SB has some major steering slop the steering wheel rotates 3inch before the steering box works. the rag gear seams tight, I have adjusted the steer box to the max. My question is, should I buy a new steering box or should I just spend the long dollar and buy a rack and pinion setup? There seems to be lots of steering box options on the net, and just as many rack and pinion setups. Any help on this topic would be
greatly appreciated