Ive seen this mk2 in the "Mk2 Pictures" section

And it made me want to add the larger pre 90 side strips to my 90 car..
I purchaced the strips but didn't realise the arches were different as the above car has the 90 spec skirts.
Is there any way around this? How have they done it? do i need to butcher a set of pre 90 arches and remove the small pieces of trim attached to them. (front and rear) currently ive a small strip of vinyl where they should be.
Here's my car as it stands, im unsure if i should remove the colour coded arches and go back to black, keep the black side trim or code the side trim to match.

any advice welcome please