bastard pack w/ inverted factory springs??

Has anyone built a bastard pack w/ inverted stock springs? I'm planning a building one but the springs currently on the jeep are inverted. Would I be wasting my time building one?

Not sure what the drawback would be if I build it.

I've read post indicated that it's not recommend but I'm not sure why. Any feedback would be helpful.

Thanks

I think that the reason people don't reccomend it is because the worn out leafs you're using will put more strain on the leafs you mix in with them, causing the pack to sag more than if you started with a decent set of XJ leafs.