I have the following text in a file say test.txt :
(Note: There can be more 'Boundary : CRAC' blocks)

```
BOUNDARY: CRAC2OUT
  Boundary Type = INLET
  Location = CRAC_OUT2
  BOUNDARY CONDITIONS:
    FLOW REGIME:
      Option = Subsonic
    END
    HEAT TRANSFER:
      Option = Static Temperature
      Static Temperature = 16 [C]
    END
    MASS AND MOMENTUM:
      Normal Speed = (3.8/1.185)[m^3 s^-1]/area()@CRAC2OUT
      Option = Normal Speed
    END
    TURBULENCE:
      Option = Medium Intensity and Eddy Viscosity Ratio
    END
  END
END
BOUNDARY: CRAC3OUT
  Boundary Type = INLET
  Location = CRAC_OUT3
  BOUNDARY CONDITIONS:
    FLOW REGIME:
      Option = Subsonic
    END
    HEAT TRANSFER:
      Option = Static Temperature
      Static Temperature = 16 [C]
    END
    MASS AND MOMENTUM:
      Normal Speed = (3.8/1.185)[m^3 s^-1]/area()@CRAC3OUT
      Option = Normal Speed
    END
    TURBULENCE:
      Option = Medium Intensity and Eddy Viscosity Ratio
    END
  END
END
BOUNDARY: CRAC4OUT
  Boundary Type = WALL
  Location = CRAC_OUT4
  BOUNDARY CONDITIONS:
    HEAT TRANSFER:
      Option = Adiabatic
    END
    MASS AND MOMENTUM:
      Option = No Slip Wall
    END
    WALL ROUGHNESS:
      Option = Smooth Wall
    END
  END
END

```

I need to search for say CRAC3OUT and replace the value of Static Temperature in its block with 17 in place of 16 and similarly change Normal speed for it with 4.8 instead of 3.8.
I need to change only that block for CRAC3OUT.

How can I use grep or pcregrep to do this?