Anyone had a '69 Firebird with non-power front disc brakes? Was it terrible for a daily driver?

I noticed the factory shop manual didn't mention non-power front disc but the aftermarket list such a conversion kit.

My '69 350 manual trans Firebird is a real strip down model which appealed to me. Non-power drums, no p/s, no A/C. When I bought it the master cylinder was near empty and the pedal went to the floor. If I can't resuscitate the brakes by bleeding I'll take it as a sign to convert to front discs. I was hoping not to have to convert to power front discs.