sorry for the downtime
Yeah, it will ride a little bit better with the wider YJ springs under the front. The YJ front springs are a 1/2" wider than the CJs front springs, so they don't have to be quite so stiff. There are kits available to make the swap, but you can do it yourself.
Let me throw in my measly 2 cents here.....It does make a difference, but throwing YJ springs under an otherwise unchanged CJ doesn't really make that much of a difference. It's one thing if you are swapping in axles that have perches for 2.5" springs-----it would only make sense, but I'm not sure I'd go through the trouble on a factory setup.