Power Brake Help? New MC and Booster Install

[YourBuddy'sTruck]

I just asked for some help here last week as I made an upgrade to power brakes from my old worn out manual set up.
My truck is a C20, 1970...for the most part anyway.
The Power Brake Booster that I installed is only a 7" Booster, but it clears the steering column, etc. and it was inexpensive.

In doing this I stayed with Drum/Drum brakes.
I feel my results are about half what I was after.
I've been told that I may have the wrong MC for this set up, but it did come as a complete "kit", so I'm not sure how that would be the issue.
I've been reading and reading and reading threads here and mostly looking at my pedal travel as it is no where near what it was before.
I know to expect some changes, but....

Looking at my photo, it would appear that my pedal linkage is NOT engaging the MC fully as it only travels about 1". ???
This 1" is with the engine running/booster working, as well as with engine off.
I just pulled the MC and supported it by rope to the hood and found that my linkage is actually traveling 2" and maybe a tad more.

Here's my question...
Is my MC blocked somehow?
I would think it to move more than 1"?
I removed my front wheels and adjusted my shoes out and re-bled everything.
My rear wheels are getting new wheel cylinders this weekend and I was wondering if anyone had some advice for me on the MC/Linkage thing while I'm working on the rear brakes.
I think that there is something simple going on here that's holding my brakes to only so so power.
Something simple that I cannot see...forest for the trees.
Thanks again....
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