They usually supply their kits with Eibach LINEAR RATE coil over sized springs for the front. (At least that's what they were for my Z28's kit.)
For the rear of that car, which would be the same type of setup as our rides (a weight jacker/height adjuster on a factory size/style spring), they gave me Suspension Springs Specialists linear rate springs.
I would hope the spring company choices would be at least similar for our app, but I would certainly
NOT complain IF they offered Swift branded coil over springs for the front AND back.
LOL