I just took delivery of a set of 2" drop coil springs for my 1966 F100 2WD V8. The springs are manufactured by a known company and sold through a well known parts supplier.

My question is rather simple.
I was surprised that the drop coil springs appear to be nothing more than stock springs with the top couple of coils cut off. The upper end is simply truncated as if cut with a hack saw, with the cut end sprayed with some flat black paint. With the stock springs, the upper coil is formed into a seating coil that provides almost 360 degrees of seating surface for the spring perch.
My question is whether or not this is sound spring engineering and a safe setup? The manufacturer is telling the supplier that this spring was manufactured specifically as a drop spring for this application. With drop springs being a popular modification, I would like to hear if others have purchased springs that look like the ones that I have described. My thinking is that if a new drop spring were manufactured specifically for this application, that the upper coil would be formed to look similar to the stock springs providing a good seat in the perch.
What do you guys think?
Thanks,
Mark

PS: I also posted this question in the 1961 - 1966 Forum