using a 97 vette fuel return style rail for this one. i want to keep it as clean as i can. im thinking about drilling and tapping the intake manifold for the FPR but after looking at this diagram of the way its run, im curious if i should keep it out in front of the throttle body or if its ok to put it behind the throttle body. it seems like it would see different vaccum variables between the 2 locations (more vaccum behind throttle body)

where do yall think i should tap? in front of the throttle body or behind?

here is a diagram of how its run on a 97 vette

 

Behind...you want manifold vacuum. Can you run a T off your brake booster line instead of drilling the manifold?

 

back of intake has a small Tit where vaccum is drawn from for the FPR

 

I liked the Titty as well.