pete
maybe this will help, maybe it won't but what the heck
please bear in mind I do not have hardly any time on my car, but in the 3 miles I have 'tested' I have found the breaks to be quite excellent with the same master and boost you have, BUT... two things
1) I am running Wilwood 13" - (the master/boost seem to have plenty to run them)
http://www.wilwood.com/BrakeKits/Pages/01/index.asp
2) After first install try, the supplied 'plunger' in the boost was too long. (this was a real head scratcher) It did not allow the master to move through full rage of motion. I machined it down and seem to have plenty of brakes. I can't imagine needing more, unless I were racing (ie abusing them, but yet maybe I presently have enough).