Dale,
Your best bet is to change the governer springs. Piers from BD performance has a spring kit designed to increase usable RPM to about 3400.
Many members have installed it and love it.
I am planning to do mine this spring.
Search the arcives for "Governer spring kit"
lots of info.
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Bill R
94 2500 SLT 4x4 5 Speed, 3.54 LS, JRE 4" exhaust, Autometer Pyro, Boost & Water temp gauges, Bosch 215 HP injectors, Timing @ 14.7š, JRE Stage III #4 plate 270/675, AFC spring kit, Scotty Air, Bully Dog Propane Injection, Roadmaster Active Suspension, Optima Red Tops, Geno's Exhaust Blanket, Espar Heater (won it!), Synthetic lubes throughout.