Short answer? NO...
If the system is properly adjusted, and there are no leaks, the manual brake system should be fine, and stop the car ok. Takes a bit more footie pressure than power fer sher, but it should still stop with no drama.
We're not trying tuh talk ya out of installing a PB system, Terry...just givin ya info about how it is....it is not a simple 30 minute deal. The booster will fit the pedal brace, but you will need to poke the two holes for the lower studs in the firewall...not really a big job. It's just time consuming...not overly complicated.
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Joel Adams
C3VR Lifetime Member #56
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"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"