I see. Based on everything else you've done to this motor, your fuel rail fitment issue seems trivial.
On the stock unit, the fuel comes-in at the rear and runs down both rails (Y fashion) exiting at the front past the FPR. What Brad did (I think) was run it around the rail with FPR and return exiting at the rear near near where the aux injector would be.
The whole reason for building that custom plenum was because he had a couple of cylinders running lean. Maybe it was due to the way they modified the fuel rail. Of course he's running aftermarket engine management. With the stock system, the injectors are firing all the time (duration controlled by ECU), so this could possibly be an issue for you if you run the fuel down one rail crossing over to the other (in series).