69 Barracuda front RMS suspension issue

My brother has struggled with his ControlFreaks front suspension because the rack gives way too much steering angle. He talked to the manufacturer about getting a rack with shorter steering stops or something and they couldn't (wouldn't?) help him so he is going to add his own external steering stops.

Best guess is that everything is fine when the wheel and tire are narrow enough, but add a wider wheel and/or more backspacing and it becomes an issue. My brother is running a pretty deep custom BS wheel because the suspension seems to be much wider than factory and he couldn't get the tire under the fender without doing something like that.

I would bet that is the issue here, the RMS rack allows for too much steering angle for the wheel the OP is running. Maybe a custom steering stop would work here?

The one outlier is Joe and his Mustang rims. Maybe RMS changed the rack since then?