Installing Hydroboost and bigger brakes in a 1970 Charger

[HEMIB]

I'm in the process of putting Hydro boost on my 71 Charger.

I'm seeing concerns that the Saginaw pump is not up to powering both the power steering & the hydro boost pump.

Is it a pressure issue, or a fluid volume/capacity issue?

Could it be a problem with the fluid becoming aerated?

I'm not working from a kit but have assembled my own system with help from a friend that built his own system for his big block Chevelle.

His brakes & power steering work just fine at any speed. Brakes especially.

He put a bulkhead fitting in the power steering pump housing for a 2nd return line.

One other thing he did was use the transmission cooler already mounted to the front of his radiator as the power steering fluid cooler.

Could the extra capacity from the transmission cooler be helping this issue?

Is the reservoir full ,has it got foam in it turn the steering from side to side a few times ,let it rest for a couple of hours so the foam dissipates.
Are the steering pump & Hydro boost lines connected correctly .Place the return line in a container & run it there fluid coming out the return line. I have 2 home built systems that after a lot of messing around work correctly.

 

[Kern Dog]

I'm guessing those were questions?
In my case, I had no foaming. I had none of the groaning a pump makes when it can't meet the demands of the steering. No belt slip.
I tried a few of the bleeding procedures but no matter what I did, I never got brake assist and the steering assist faded to almost nothing, requiring me to change pumps. Each time a pump crapped out, I had to pull the pump out of the reservoir and put another pump into that reservoir. It was tedious and annoying. I did find a kink in the power steering fluid cooler that is plumbed through the return line. I've driven a few thousand miles now since and several thousand miles before the hydroboost attempt and have had no problems with the steering assist.