'68 C20 No bite 2 Brakes!

[A 68 Wreck]

Hello Again.

I just completely redid my front drum brakes (cylinders/shoes/drums/clean), and installed a new Master. Brakes have a large booster, about 5" deep. Bled, bled, bled all four wheels until clean fluid came out, and brake was/is firm. No leaks.
On my test run, there was little to no bite to my brakes. It was more a slow drag, w/ my applying strong leg pressure. The pedal remained firm 3/5ths the way down.

Maybe Booster? Not certain how to test?
That little manifold thangy below the Master? How test that ?
I imagne I should have more brakes/SOME brakes even if the rears are poor as it is a dual reservoir?

Thanks, and I apologize ahead of time if this topic is over grilled!