Nitrous is fine with a stock engine as long as you keep the HP boost to 100 or so and pay attention to the details...
Really, the only thing I'd add would be an electric fuel pump, properly interlocked with the ignition and nitrous, a good fuel filter and a good set of mechanical guages.
You might consider upgrading the ignition system since cylinder pressures do rise with the addtional charge densities from nitrous.
If you keep detonation and pre-ignition from nipping at your heels, you shouldn't get too bloody from squeeze...*G*
Pat
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