It seems that instead of just swapping parts straight from the wagon into the sedan i'm having to remake a lot parts. The wagon was built as just a cheap car to thrash around, so function won over form. So i pulled the arms out of the sedan and cut them up. I extend the arms after the castor arm/swaybar holes as this gives the most clearance at full lock. Heres the 20mm extension tacked in place. All welded up. And all done after a coat of hammerite.