power brake upgrade

[scarecrow2613]

Pretty new to this forum, and to my c10. I have a 1970 c10, when I purchased it, it already had a 5 lug disk brake conversion but the stock rear end. I recently purchased a ford 9" out of a bronco and got a disk brake conversion kit for that also. I don't have power brakes in the truck now and with just the front disk brakes, it doesn't have the response it should. I can only imagine that when I put the rear disks in, they'll be worse. SO to my actual question, what do I do for a power booster upgrade? I'm open to any ideas. thank you in advance.