You can always install a pressure switch between the nitrous solenoid . A 5psi switch would insure that you dont melt your rings and such. Oh yeah, it goes on your fuel takeoff line to the fuel sol. ,called a Hobbs switch. 20 years ago I had a mild 455 pontiac w/ 175hp jets and an 830 annular holley on a single red pump. That's about 570hp to run 119.6mph in a stock 71 fbird. The stock pump is trouble w/#70 or bigger jets in your nos line.
Hope that helps....Tres