With coilovers you might be able to just get a shorter spring and wind the perch up the thread a bit if it fouls.
Actually if you look at where chris’ tyre rubbed the perch onthe pics above, it was on the edge – coilovers springs, perches etc are normally smaller overall diameter than regular shocks so it may not even be an issue.
I guess it will also depend on the width + offset of your wheels & tyres..