I am running a greddy profec boost controller, with a vac line out of the back because it has a built in boost gauge. I need to find a firewall passage that is safe to run the line through without risk of pinching, cutting, breaking or any other assorted mishaps. Prefferably easy to get to but so far I havent seen ANYTHING that looks remotely good in terms of fire-wall passages.

 

I cut a small slit in my engine harness grommet and ran a vac line through there behind the dash into the back of my center console

 

thats on the far left of the drivers foot area, almost touching the fender?

 

The correct way to do this would be to use a vac, bulk head connection. It's a little more involved, but it will give you the best results.