Will this http://store.summitracing.com/partdetail.asp?part=8250 work with my setup? I have a 305 TBI with this setup;
75,100,125 Hp Nitrous system
NOS Purge Valve
NOS Bottle Heater
NOS Bottle Blanket
NOS Blow Down Tube
MSD External HEI Adjustable Timing Control
Nitrous Pressure Gauge

Just want to make sure this fuel pressure saftey switch is the right one for my car and Nitrous system. Cause its suppose to be for carbs but my throttle body injection runs the same psi usually as carbs so I wouldn't go with a 30-40psi cutoff for the EFI Fuel pressure saftey switches, I would want the carb FPSS that shut the fuel off at 4-7psi which would be my area. But will it work with my TBI and my NOS kit?

 

91,

You'll need something like that, but with a pressure range adjustable from 10-15 PSI (or 10-whatever). Your stock fuel pressure regulator should maintain 11-13 PSIG.