Pressure reading on holley tbi

[dirtwarrior17]

where do i take the reading on a holley 670 cfm 2bbl? I don't know if im supposed to take it before or after the regulator.... thought it was after but the regulator is in the tbi and it doesn't look like i can get a reading anywhere after the regulator. Can you get an accurate reading before the regulator?

 

[eagle mark]

You want the presure gauge on the line going in.

 

[dirtwarrior17]

appreciate it,