In the "Well, that's cool" bucket: I am on a couple of Aston groups on Facebook, and today someone from the Gaydon factory (where my Aston was built) messaged me offering help with electronics and such if I need it. That's pretty darn cool, gotta love the internet.
I'm working on the fuel system a little this weekend, along with the wiring. I'm going to snake a hardline behind the blower, under the cowl, to shorten how much flexible line I have on the car. It'll terminate in a bulkhead fitting above the passenger valve cover (basically opposite of where it exits stock). The Aston feeds fuel on the passenger side, so this will let me run an ~18" soft line up from the hard lines (which will be 3/8 anodized aluminum with AN tube nuts) and make it easy to service. I'm going to put the flex fuel sender behind the blower because it fits there and I'm tight on space in that area. LOL
The hard line will terminate at the rear subframe, just like the Aston did stock, and I'll have a tee fitting with a port for a GM fuel pressure feed line sensor to keep the ECU and GM Fuel Pump Driver Module happy. I'm going to PWM the fuel feed with an OEM controller just like GM did, albeit with a little bigger pump and an MSD booster to pull the voltage up a bit. Should be plenty to keep the HPFP fed and let the direct injection work in a factory like manner.