I recently installed a power brake booster on my 66 convertible. The car has drum brakes all around. I have no desire to switch to disk brakes or a dual master cylinder. The trouble I am having is that the brakes are really hard to push. The throw is much shorter than when I had manual, but much harder to push. They are easier to hold down when at a stop though. The guy who installed them (I am sort of a rookie) teed off an existing vacuum line rather than going straight into the manifold. He said it should not matter. He also said that they won't be as easy to push as my other cars (88 Acura, 99 Dodge). I understand that, but they should be better than they are.
Does anyone have any ideas as to why I am having this problem, and what I can do?
Thanks from the new guy.