What rear springs to run?

The car looks fine now. In fact it looks like it is already higher in the rear than it should be as stock.
I suspect the reason it is bottoming out is because of the larger tire size.
I fixed this by adding a leaf or maybe changing one leaf to a longer one.
To tell you the truth, I can’t remember which one I did.
But I’m running a Diplomat rear under a Dart Sport and it’s wider too. So I had an issue with my 15 cop tires hitting with a load in the car.
Either way I had scrap springs lying around and that’s what it did.
I didn’t want an *** up look either. So no extra arch. Just stiffer.

Be aware that if you stiffen up the rear of a car you tend to increase oversteer.
If you stiffen up the front of a car you tend to increase understeer. (Desirable)
Also I’ve got it in my brain, I think from Larry Shepherd, that Chrysler designed the leaf springs to be almost flat at ride to improve handling.
(T/As and AARs excluded for exhaust clearance. They had an arch)
So when someone says springs are flat, that’s normal.
And I'm also of the belief, that shocks aren't for holding the car up.
They are for dampening purposes.