Perhaps I am missing something here but I don’t exactly have the means to dissect the block. Dennis may, but as an ELECTRICAL engineer I surly do not.
Also, we have systematically eliminated all other possibilities which have been painfully detailed out in this thread which LEAD Dennis and I to the block.
If you would recall, the block was on of the first identified culprits. Only after systematic elimination of all other culprits did we replace that block.
So if you have eliminated all other possibilities except 1, wouldn’t you be compelled to eliminate that very last "puzzle" piece? That’s what we did, we replaced the last puzzle piece and our problem went away. I am not an expert on the working of that block or how it could produce the problem that it did so I cant give you a exact reason. But I can tell you or anyone else that is reading this now or in the future that it was the cause. We didn’t haphazardly throw parts at this problem nor would I ever ask anyone to do that on their car or in their professional life. As an engineer for a major global corporation I can assure you that just doesn’t fly. Other industries however make a lot of money at the customer’s expense this way but we don’t.

So here is the lesson for our "fledgling brother in birds":
If you eliminate all other possibilities detailed in this thread or others and still cannot yield a high, hard pedal, replace the block. It will cost you about 20 bucks from FirebirdBill and may solve your problem.
This should about do it for this one Jim, I whole heartily apologize if this explanation isn’t good enough for you. But it’s all I have.