i wouldn't say "stopping" is more difficult, the brakes are the same ones that were already there. unless someone has issues with their leg strength, you just need to push harder to apply the same force to the system. the woman who bought my 74' had some leg issues and apparently had no problems stopping it considering she drove it all the way to northern california. i've done this 3 times on my own cars without changing the MC and would never go back to a power booster. drive it first and see how you like it. this is completely a personal opinion on how someone likes the brake peddle to feel.
