The choices for an adapter were few for the blue fitting - that's an Earl's fitting and picked that up at Summit. It connects the -8AN underside bulkhead to a 3/8 NPT to fit into the 3 port air fitting. That blue fitting gave just enough overhead for the round 3-port air fitting. The black fitting is a long radius bend and terminates at about the same level as the supply assembly. I needed it to be a swivel fitting to direct the return black hose away from interfering with the level indicator.
Before I forget again: is there a functional difference between the black, -6AN, 90 degree return fitting and the blue, -8AN, 90 degree feed line fitting? Size differences aside. It looks like they're both finishing their turns at the same distance below the bucket. That leads me to believe that the return fitting has a larger bend radius, but I could be wrong. It looks like it might have a little straight section before bending.
The only reason I asked is because I have never heard any real life feedback on that setup. A regulator at the exit of the fuel rails is all the information I've ever had. I've seen and heard a lot of feedback on ITBs but not much with fueling demands in any of the cylinders. The aftermarket fuel rails with larger volume is overkill for NA stuff and likely get no benefit but I would think that fuel hungry FI setups get more than sufficient fuel flow across all cylinders. In other words, larger volume rails compensate for equal volume for the injectors. In some tuning applications (no idea with HP Tuners), you can tune individual injectors.
AFAIK, having the regulator at the front of the fuel rails ensures that, should you see a pressure drop between the rear-most and front-most injectors (which you might under WOT), you err on the side of dumping too much fuel into the rear-most cylinders instead of too little. Should make the car easier to tune--especially later in the game when I start working on the 3.3/4.0L Whipple build.
Over the last few weeks, I've been ordering parts and beginning to mock things up in my apartment (since I don't have a nice garage like you--thankfully no wife). It's going to be very cold when I install this thing--this morning it was 43F.