How wide can you go

[tls85]

So I recently came into my dad's old sweptline. But of a Johnny Cash unit as he called it. Registration says 68 front clip headlights tell me it's a 62. Anyways. Doing a disk brake conversion because everything's seized from sitting and the price is right. Wonder how wide of a tire she can fit at stock height? I like the road course racer stance and hoping I can fit 11wide up front and 12+ in the rear. Has anyone ever tried this or know?
Thank you

 

[7mopar]

The question would be how much sheet metal you will to dispose of?

 

[tls85]

The question would be how much sheet metal you will to dispose of?

Preferably none. The body's still in great shape for its age. Got a set of cheap 15x10 wheels. Time to start measuring