Hi my name is Matt I'm trying to hook up a boost gauge on my Ford F350 1994 7.3 liter IDI and I have no idea where to hook up the vacuum line for the boost gauge

 

right into the pressure chamber.






if your pressure chamber has no pipe plug.simply drill and tap for the boost line.edit; that of course means removing the pressure chamber from the engine before drilling so you can wash away,drill filings before re-installing.