UPDATE:
Success today with me and Matt having a go at pumping the rear guards to fit the massive wheels and tyres.
We used a porta-power (pneumatic ram), grinder, hammers and 2 heat guns.
Overall we pumped them approximately 35mm extra over what was already flared a few years ago. So overall it's about 50mm wider than GTSt guard
We had to cut the inner guard and reinforcing to allow it to stretch out.
Considering what we did the guard has come away ok. It kinked in a few spots above the arch but really it's better than we expected. The paint didn't even crack! We kept it really hot throughout with the head guns.
There is plenty of room under there now and with dynamic camber it should never hit.
This is now it started
This is what it got to!
Overall it took about 3 hours. Next is doing the other quarter...