Power Brake Hell..... HELP!!!

I say you are going down the wrong road, here. A booster CANNOT POSSIBLY affect front/ rear proportioning.

You may have MULTIPLE problems.

Here's the thing. SURELY you've driven "other cars" with power brakes. You should know what to expect "what pedal feel" you will get. Are you saying this car is much more spongy?

Does it easily lock up with little pedal pressure? Normally, if you have a good booster, no air, and some problem "in one end" of the system, the two wheels that are working should easily lock

I'm not saying DON'T ditch the booster, you may well prefer manual. But I'd bet that if you do, it still won't stop.