poorboy thanks.
I had not thought about cracking lines open for the master cylinder check.

I did disconnect the master from the booster and verified full motion on the booster.
I am still concerned about lack of assist, but will check the master first now. But with the number of failed univeral boosters, I am not ruling it out just yet even if the master has some issue.

no proportioning valve on this car. was a single pot master, and all I did was run dual lines. (I know, I know, I should add one, just never got around to it).