boost gauge on procharged 7.4 mpi

[snake plissken]

where can i tap into on my engine for my boost gauge to work? I have a 7.4 mpi 310 H.P with a M1 procharger thanks stealthtturbo@aol.com

[Beer-30]

Does it have an auxiliary FMU? (fuel management unit) If so, the vac line that feeds that a signal would be just fine.
Or, probably easier, just T off of the line to the original fuel pressure regulator. Any of the vac lines should be fine.