If you've got 5k to put down, its time for a supercharger....
For light to light races, the torque of the FMS roots type blower is great.
(Plus it looks kickin' under the hood)
For a little less torque but more boost\hp, I'd go with Vortech or Procharger....
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"The Yellowjacket"
Ricer 1: What the heck was that!?
Ricer 2: I don't know. It looked kind of like a yellow SN95 Mustang.
Ricer 1: Nah, fast SN95 Mustangs don't exist... Must have been a mirage or something...