Fuel line routing to fuel rail?

[D-n-Tyke]

Getting ready to finish running the fuel line in my suburban. Line is currently running down the passenger frame rail. I have a 3/8 hard line currently run up the frame rail just about to the where the frame starts bending up towards the front suspension. What I am trying to figure out is how far up from the frame to run the hard line and then transition it to AN rubber line.

How are you guys running your lines? Anyone have pictures of how they have their lines run up feom the frame to thier fuel rail?