Yeah, but if he's saying the pedal feels the same with the booster plugged in or not, then it could be a faulty booster.
When i had my GT MC in, i could still comfortable drive the car around, but the pedal was stiff as hell especially at higher RPM like on the highway. I had to put the 93 Cobra MC to get a decent pedal feel out of it.
Groverdill, do you have access to a vacuum pump at all?