Bleeding brakes - one issue.....

[57rookie]

So when I bled my brakes this summer after installing a new power brake booster setup i started with the RH rear wheel end I could not get the fluid to bleed out with many pedal pumps. All other locations seemed to work ok.
What do you guys think - would there be a blockage at the tee block on top of the difff or maybe in the brake line and if so how best to clear the blockage....
It seems as if the booster has not performed well in my opinion even after changing the front disk brake pads....
One thing i did not do is bench Bleed the master cylinder with the kit provided by CPP (Classic Performance Products ) as i thought that I could get the air from the small lines that come out of the master cylinder reservoir out by bleeding at the wheel end. Was this a big mistake????
Looking or opinions. It feels like a hard pedal with poor braking performance is the best way to describe it.