Mopar gods are smiling today!!! super six found

I've gathered my tools and am taking monday afternoon off work :)
Yeah it seemed like a good deal, but I'm getting it for the daily driver. It is burried treasure but, I'm keeping it!!
I'm getting anything that will fit my car..
Should I get the power brake booster to convert my car later?
I have non-power disc brakes - is it even worth it to upgrade? I have driven both power and non power and it seems that I can hardly tell the difference.. don't even know what is involved for the swap.