Brake booster question for you guys.

In my experience
If you get a complete system of booster/M/C/ and pedal, the swap is relatively painless.
Also the dual diaphragm I had (just one) worked perfect on the factory 340car it came from, but it didn't work well on my big-cam combo. I can't paint them all with the same brush, but I took it apart to see if something was internally wrong...... and found it perfect inside. So it seemed to me that it just required more vacuum than my cam was making.