So with my engine swap project, I did not have pump that would now work with the returnless fuel rail.
I also could not take a NA FPR and put it on the fuel rail because the NB fuel rail is different than me NB2.
List of special tools needed:
1/8 NPT tap
21/64 drill bit
Fuel line disconnect tool(?)
Sealant for the fuel rail outlet barb
I won't go into major detail, but I will go over the general process.
You will have to remove the fuel rail, which requires removing the intake manifold.
Each intake runner will have 2 12mm nuts and there are 2 12mm(?) manifold support bolts. Underneath and between the number 3 and 4 runner there is a 10mm bolt holding a pipe for the oil cooler I believe.
After you remove the intake manifold the fuel rail will have to come out. Unplug each injector and there are 3 12mm bolts holding the rail on. Don't loose any of the bushings for the rail.
Okay, time for pics. This is where you will tap the hose barb.
Secure the rail in a vice (don't crush it!)
Use your punch and try to make a pilot dot right in the center. and drill the hole using a 21/64 drill bit.
Now take your 1/8" NPT tap and I got about 3 good threads. Grease the end of your tap and it will collect the shavings.
Thread your hose barb in to make sure it's the right one.
At this point grab your carb cleaner and really, really clean the rail out. Get every last shaving out of that thing you do not want them clogging your injectors.
Once you clean it I wrapped my barb twice with teflon and tightened until it bottomed out. You can use whatever sealant you prefer.
Put the rail back on.
Now you have a return style fuel system!
Put your pump before the rail and the regulator after and you're golden!
If I got anything wrong feel free to let me know and I'll fix it.