Ok to use Power Booster on Dual M/C Without Splitting Lines?

[Blue_Aura]

So, in the interest of running out of time and money, I was thinking about hooking up my new power brake booster and dual m/c but only connecting the stock single line to one of the m/c's. That way, if the next owner wants to split them, half the work has been done for them (all they have to do is run the new lines and split them) and it will have power brakes when I sell it. I know that it is MUCH better to have independent front and rear brakes, for the safety factor, but it just might not be doable at this time.

My biggest question is... if I am only using one of the reservoirs on the dual m/c, should I bench bleed both of them and just use a plug on the one that I do not use? Or, do I just not fill the unused reservoir?