Head springs......

[Shotgun28]

I was thinking that with 90,000 miles on my baby that while I save for some new heads that perhaps getting some new springs may liven her up a bit, does anyone have any ideas, thoughts or cost est. of doing this and how hard it is to do yourself. Would it be worth it, new heads next year.....Thanks in advance.

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91 LX Convertible Gray on Red B&M Shift improver kit, March underdrive pulley's Richmond 3.73 gears, 1 5/8 Flowtech long tube Headers and off road h-pipe, Flowmaster 2-chamber cat-back with S.S exhaust, MSD 6A Ignition with coil,Cap and rotor, Taylor Pro wires, K&N 12" conical filter system, Jet stage 2 performance chip and Lentech Street Terminator plus on it's way...