1969 Dart rear quarter cut outs

What I'm looking at is a stock 1969 dart /6 that has some rear wheel well cancer that i found here locally. I can pick it up for $1200.00 and I have always loved how the rear wells look on the LO23 Hemi's as compared to the full fendered cars. I would want to make the cut as accurate as possible.
I would want to go with a 440/727, and run a 30x11.5 or so rear tire.