Can I use different coil springs to lower my front?

[fsjeep]

I have a 94 ext cab 2wd & want to lower the front about 2". I'm a newbie to spring ratings etc.. but I've been looking at the Moog Catalog curious if I could get a different "stock" spring to fit my truck and lower it. Below are a few I have found. CC650 & CC648 are stock recommendations for my truck. I narrowed down the same end types and Inside diameter then 2"-ish lower Install ht at a similar load and got 5044 & 578. First thing I notice is the spring rate is dramatically lower. Am I correct that the spring rate is X lbs to press the spring 1 inch? If so will these springs with a 350 lb spring rating be too soft and bouncy even at the same load rating? Would it be better to look for a 600-700 spring rate?

Model__Insideø___Barø_____Install ht____Load_____spring rate___free ht
CC650__4.08_____0.906_____12.75_____2325_____1025________15
CC648__4.056____0.875_____12.75_____2300_____870_________15.25
5044___4.08_____0.687_____11________2360_____334_________18.06
578____4.08_____0.703_____11________2325_____358_________17.5

Any ideas/suggestions?
Thanks