adding a steering stop to Global west LCA

[gui67]

Hi,I have a 67 Camaro.
I installed control arms from Global West (CTA 79L), but unlike the stock LCA, or other manufacturers, they don't have any steering stop.
So the steering angle has increased and the tires rub.

What would you suggest to add steering stop? drilling and taping the tube, or welding a nut? Or should I modify the steering knuckle? (this one is stock)
Any idea on the least dangerous modification?



Thanks in advance
Guillaume