New brakes, soft pedal, distribution blocks ?

So I have all new stopping components in my car, which is not road worthy yet, and have about 4-5" of travel in the pedal before it starts to firm up. Brakes are bled, no air, no leaks. Bled using a pressure bleeder, not vacuum.

Here's what I have:
68 barracuda manual drum brake car.
Frt Drdiff brembos
Rear Drdiff cobras
Braided flex lines
Drdiff 15/16 master
Drdiff adapter 4 to 2 hole
Stock manual rod
Distribution block from 69 valiant, not sure on brake configuration of said valiant.

Now I do have the distribution block that came off my car. There are a couple of frozen lines. That's why I used the valiant block.
Is there any difference between the two? 68 to 69 regardless of brake configuration? They look a bit different. Is there any way it can be causing my weird pedal?

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