searching for front coil spring replacements for a 1975 Plymouth Scamp

Have you checked your tire type and pressures.
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I've been running T-bar cars almost continuously since 1970, and when radial tires came to town, that was the best thing ever. and second best was running the fronts at 28/29 psi, in town.. and
I always run the rears at 2>4 pounds less, except my 295s are at 24, cold, always.
On the hiway, I might pump them up around 4psi cold, for long trips.
But if yur running bigger than 15s, and less than 50 series, forklift tires, then nobody can help you. lol.
I run 1.09 T-bars, super-duty shocks, and a big fat sway bar, allbeit with a small V8, and no way would I call the ride bumpy nor stiff. The tire pressures that I mentioned is what is required to make the tires wear evenly, for a long tread life.
If your ride is supper-bumpy, perhaps your LCAs are on the bump-stops. This would make your ride-height very low indeed.