As for the fuel pressure line - I ran it the same place as the boost line and other wires. Make sure you get all the connections TIGHT - you don't want to have any leaks coming in to the cab.
Of the whole project - each had it's tough points, but after the whole project, it was easier than I thought. Just took longer than I planned on.
Just a precaution - take a paper towel and wrap it around the fuel pressure line to see if there any leaks.
The test drive was fun - the pressure was 14. 5 at idle and just nornal driving, it was 13-13. 5 - WOT it was down to 8. So, I guess I'm fine for now - hopefully the pressure won't go down any and I'll be one of the lucky ones that has a good lift pump... yeah, right.
Next project - Northwest custom mud flaps...