Thanks for all the input,
@glwood and
@Ranger_b0b. So, just as you two had me convinced that the LD springs were going to be just fine, the plot thickened.
I contacted the seller, and let him know of the error. Very pleasant fellow, so I treated him in kind. Well, he kind of chuckled, and explained that the boxes he shipped them in are not the original boxes, as I had assumed. He said that if I run the numbers that are on the factory tags on the springs, I will find that they are, indeed, the HD springs I so desire. Ummmm...oops! Man, am I glad I approached the issue with some manner of civility, because I would have looked like a real ass once he pointed out
that little piece of information. Anyways, we had a good laugh over it, so it's all good. In fact, I ended up discussing the possibility of him fabricating a front bumper that resembles the Currie V-bumper for me. He looked up an image of it, and said to give him a week to look into it and crunch some numbers, and he'd give me a call back. So it'll be interesting to see what he comes up with.