I was able to spend a little more time on installation this evening, and installed the Fuel Pressure Regulator (FPR).
This is another bit that isn't quite bolt-on, since the hole in the mounting tab needs to be opened up just a little bit. A moment with a step drill did the trick.
Then, I just had to attach the fittings to the FPR. I also added a pressure gauge, which was previously installed on the old fuel injection system. Then the FPR mounts like the stock FPR. Only difference is I will need to run a vacuum line to the top of the FPR.