Brakes - am I expecting too much

[A1971Blazer]

I've recognized that it may be a bit more expensive, but while rebuilding the brakes on my '67 C10, I installed disc brakes only on the front and used a hydro-boost unit.
The braking performance is exceptional, and yes, it can easily lock up all four wheels; however, the braking efficiency and control make this a non-issue.
The brakes have a solid feel and minimal foot pressure is needed to bring it to a stop.