Hydro-boost questions (looking for data)

This is a nice system but its $450 (just the HB unit, everything else is extra). You can buy a HB unit off Rock Auto for $122 - $200. I am trying to determine what is different between those listed/made for a car over something off RA. Obviously it would be the mounting system and the rod; I am fully capable of making or altering both of those items so I am really trying to determine what is the best course of action; which unit is the best to start with, etc.

I am leaning towards a Dodge diesel unit, one because its Mopar but more so because I want to use a Mopar MC and I know it will bolt up. What I am unsure of is the mounting plate (can I remove it or alter it) and the rod (can it be removed).

It was a post to give an example. You can always call Wilwood and see if they will offer the HB unit alone if you want a different master cylinder. I'm still unclear on exactly WHAT it is you're looking for. Individual components to build your own? Trying to keep price down? 450 for that entire unit is pretty reasonable given comparables available, so I am not understanding what you're after. Seems to me it's a totally bolt in unit. Was that not what you were looking for?