just a daft thought here, whilst i know the turrets have to be modified for the coilover to fit, are any reinforcements being made?
as technically the rear turrets were not designed to take the weight of the car, and only designed to take a damper!
i dunno, perhaps iam getting ahead of myself, and maybe the viva/firenza has adequate strength in that part, but i have seen funny things happen on other types of car when a coilover has been fitted in place of seperates (the shell started to implode!!!)
if iam waffling tripe again, please ignore me