How to cut out rear wheel wells (radius wheel)

I found a picture of the wheel openings. This was on a 51
Chevy coupe so I will spare you the photos of the entire car.
It was a lot more of a slab sided car than a barracuda.
Also found a photo of the homebuilt sheet metal hood scoop.
I find this kind of body metal work much more enjoyable than
the spotweld cutting and replace with a overpriced repo
stamped panel I am working with now.