Hi @dustinkerstein, and welcome aboard! 
I’m not sure I understand what you need, but I’m going to guess a bit:
- if you want to see the raw histogram straight away in RT, click the raw button (
). You will get a raw histogram, scaled in a linear, log or log-log scale ( 
) - if you want a file that shows data the same as they come out from the sensor (after demosaicing), I’m not sure if you will need to use the same profile as an input, working and output profiles, so the data is not converted at any step of the process. But in any case, you will need a linear output profile: you can create one yourself with the ICC Profile Creator
) (this is for advanced users), or select one from Elle Stone’s repository of high quality profiles, with a linear TRC (called whateverg10.icc) - in either case, I don’t think that has anything to do with UniWB…
- for the clipping indications as stated in RawPedia:
The histogram shows the channels listed above using the gamma-corrected output profile when the gamut button
is disabled (default), or using the working profile when the button is enabled. The status of this button also affects the values shown in the Navigator panel, as well as the clipped shadow 
and 
highlight indicators. It does not affect the raw histogram.
It has nothing to do with the Clip OOG colors option (which refers to an entirely different thing)
Hope it helps