My point was simply that it isn't a complete solution...you need more to work out the weaknesses in the stock 4-link set-up than just the couple pieces that come in this package.
I wasn't aware of the spring rates, but spring rates are such an incredibly small piece of the equation
If your goal is to do a low-budget build up and look cool, go for it...if you goal is to handle well, I wouldn't go this route
FYI--> I was a college student to until about a month ago and I did all of my cars (including two porsches completely rebuilt) on a working college student's budget, so I understand your constraints, but don't put yourself in a position where you spent your limited resources on something that you aren't happy with and end up replacing