Blair, my first 86 setup was exactly the same as yours, actually my current 86 is as well now that I think about it.
My first 86 started stock as thy rock. Then I added Corona LCA's and would run out of lock when drifting, then added PS arms and found at first I would hardly ever run out of lock, then when pushing limits would feel it hit full lock (like in your picture it would physically stop). I like that feeling cos there is none of that crazy wheel wobble you see in some datto's at full lock.
My setup looks the same as yours (hitting LCA as well), and I too have trimmed front bumper. I think if it feels ok drifting, run with it, then down the track try some ackerman correcting arms, thats my plan anyway.