I always use the large charcoal canister (purge canister) vacuum line for my signals. Use a vacuum distribution block or just a bunch of well placed "T" fittings and you'll be fine. Get your boost gauge source from there and your BOV source from there. If you are using an EBC then get the source for that from there too if you want.
If you're not going to delete the charcoal canister, then it is a better idea to leave it alone and get the source from somewhere else. You can source vacuum from the EGR system if you've removed that like most of us have.
If that's not an option, I would drill and tap the plenum for a dedicated vacuum bung and source everything off that.
If that sounds like too much work, then you can still "T" into the EGR signal line(s) and be fine with that.
What ever you do, leave the FPR vacuum line alone.