Vacuum from the inlet manifold to remote brake servo

[topconker]

Despite my best efforts at improving my rear brakes, I've decided to fit a remote servo using the inlet manifold as a vacuum source.
So, I have a 1600 VW beetle single port engine with the inlet manifold serving both sides.
Where's the best place to tap into the manifold?
What size tap is best?
Anyone done this before?
Appreciate any help here guys before I start drilling.
TC