Vacuum port for a brake booster

[oiler]

I've got a 3 deuce Offy intake for my nailhead but I need some advice on where to tap into it for a 3/8 port for a brake booster
On top is out of the question (no room at all)
For those that don't know it's open under the intake with a valley pan
I could drill into the back or underneath
Just wondering if I drill into the bottom would I end up with fuel in the line
(I think so)
I also need a port for a pcv so does anyone know of a 2 port vacuum tee with 3/8 nipples on them
Thanks
Jeff