You may want to install an accumulator on the wiper side to "store" vacuum for those higher load operating times that you also need wipers.
I adapted a 1 lb propane cylinder as a vacuum accumulator for the wipers, but when I tried the wipers, they still stalled out when I mashed the gas pedal. This was on a dry windshield however, as I haven't had my truck out in the rain yet. As far as the power brakes, that will likely work OK, as the vacuum chamber for the brakes is fairly large and has a check valve to keep the vacuum built up. I did have a check valve between the engine vacuum inlet and the accumulator and wiper motor (rebuilt by Fiken).
Kevin 1951 Chevy 3100 work truck Follow this saga in Project Journal Photos 1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car) Busting rust since the mid-60's If you're smart enough to take it apart, you darn well better be smart enough to put it back together.
