I think I'll change the brakes
I just got this car- the former owner stated he'd replaced the booster and master cylinder- they are new, I don't think he got into the wheels, he said he thought it had air -needed to be bled. its a drum brake '65 Monaco wagon (for sale) beings I didn't see the power booster he removed I cannot compare to what it should be. the single line master cylinder is correct.
as I did get to drive it around the block -after I sent the first question-the severe braking is only at the right front wheel, I'll address that and see what I find. thanks for the input.