Not enough vacuum?

You will NOT need a remote vacuum storage device.
On a high vacuum engine, the booster doesn't care about where it is hooked up... so long as the check valve is working at the booster.
On a engine with marginal idle-vacuum like one with a very-late closing intake, the pulsing in the ONE port runner (often #8) can drive the booster wild. In this case it usually works better if I increase the distance to the intake valve by plumbing the booster directly to the plenum; but NOT to the PCV port nor Tee'd into the PCV circuit. As soon as the engine comes off-idle, the vacuum pops up to a level sufficient to activate the booster. But the check-valve is there to maintain the vacuum for at least one long slow brake application.
In my experience with a manual trans;engine braking will keep the single diaphragm booster charged if you augment it with downshifting...... even with a 292/108 cam. I did have trouble keeping the Dual-Diaphragm charged and eventually swapped it out.