Histogram numeric values

[ghatch03]

I have a task to create a high contrast photo with specific numeric values on histogram. I need midtones, for example, to be within 195-230. Is there a feature in camera raw that can show me EXACT numeric values of highlights, midtones and shadows on the histogram as they fall between 0 and 255? 

[TheDigitalDog]

The simple answer is no, the numbers are based on the internal processing color space thus this should be done in Photoshop after ACR. You can then at least view rendered numbers there.

[elie_dinur]

Andrew - I always thought that ACR's histogram is in its output space, as opposed to LR which is always in Melissa.