you ain't been on the bumper yet
and I used Moog springs on my stock suspension Chevelle...
That said, who makes the spring isn't important, what is important is that you use the tallest spring that will fit with a wire diameter heavy enough to the support the nose weight within 10%, that when compressed at ride height results in a air gap of no more than 1" between the factory snubber on the lower control arm and it's point of contact on the frame