I was just going off of the installation sheet from Greddy for an external wastegate and the profec b.
What I gather from this post and mixed with what Greddy notes, I should...
1) Run vac line from intake manifold to head unit
2) Run vac line from charge pipe to EBC's input
3) Run line from EBC's output to WG's side port
4) Let top WG port vent to atmosphere
