Is it hard to replace coil springs? Should I pay?

[jpumpkinn]

I need to replace the coil springs in the rear on my 90 5.0. I was going to have it done but it will cost me $200 just for labor. I was looking at steeda springs I have koni shocks already. I have never done this but have done alot of mechanic work. Should I attempt this task or is it worth the 200 bucks? Also, how about the front springs?

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Red 90 5.0, 17in Cobra Wheels, Saleen Wing, Cobra Ground Effects, K&N intake, Dual Flowmaster, Hurst Shifter