Newer ones have a few hundred more RPM's then the one you are using, but you would have to hard wire it in as the plugs were changed. The Big Gun will get you an extra 1000 RPM's and advance your timing some for better performance. The Vortex will get you up to 8900 RPM's with a good performance curve, plus it can be programmed for various other applications as in using Noss.... The RWR advances the timing as well, however it removes your rev limiter all together. If you have stock valve springs you could end up floating a valve if you get your RPM's up too high.

Hope that helps....