brands to buy when adding a leaf to a leaf spring

I added one leaf that I took off my M body parts car. Since the original springs were sagging quite a bit I can't really say how much over stock it picked it up. It does have a nice stance and good ride now.
Total cost was less than $10 for the new clamps and I did put new spring bushings in front & rear.
I don't know why, exactly, this would be called half-assing it. Is it half-assing to rebuild an engine rather than drop in a new crate engine?
C