So, I'm thinking... if your OEM spindle arms were too high, the tires would scrape as well. Ok, that's why stops are absolutely necessary.
I really like the idea that the arms are shorter because they are more responsive to steering wheel motion, with fewer turns lock-to-lock. The down side is, you need more power steering boost in parking lots. Even so, I would prefer the shorter arms because they are more compatible with rack and pinion gears.
Glad you got this mystery solved, Grant. Maybe you can have a small 'tab' welded to the existing stops. If we were closer I would weld them for you. - Dave