Getting fed up...

I've used the newer masters too, but in this case I used the original style master cylinder so I could retain my factory booster- the new two-bolt aluminum ones don't fit, and no- you can't use the adapter plate on a booster. Besides, the odds are no better with a late model parts store master than with an earlier parts store master...
And here's an update on that master, while we're at it:
Upon disassembly, I found the ENTIRE secondary piston and spring were installed BACKWARDS. Hmm... no wonder there was no pressure!
"Built and tested to meet or exceed factory standards" my everlovin' a$$.