Mark V8. To me the lack of clearance would be hard to get over with any form of rolling. If you are wanting such wide tyres to clear the bodywork under all driving conditions ( over bumps and hard cornering etc ) cutting the arches and making good would be my choice. A good fabricator should be able to sort it out.
My Saff has only got 215/40/17s on it but is lowered and I had to have front and rear arches rolled for clearance.