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

When 67Dart273 speaks, you need to listen. Ditto for 67DARTGTCONV (1967 was a good year). It can't be the booster! There is a single rod from the booster that pushes the MC pistons. You get pressure to the rear tube, so the MC piston is moving.

As mentioned many times, you probably have air in the system. You still didn't explain how you bled the MC. You also didn't verify that the caliper bleeds are at the top. Just saying "no air" doesn't convince us. If not air, then probably a problem with the "combination block". You didn't specify what you have, other than "adjustable prop valve". If you have what I think, the block has a "metering valve" on the front circuit, whose purpose is to hold off front actuation until the rear shoes contact. That could be blocking the flow if defective. However, not sure how you would have bled the fronts then.

Re pedal height, first check if you have an adjustment on the rod out of the booster as some have. If not, you will need a longer rod from booster to pedal.