Awesome build! Spent the last few days reading through the entire thread and I love what you have done with the car. I agree with Jack on using the stock fuel rail, much better fitment as well. FWIW in my old ranger 2.3 turbo setup I was pushing over 450whp on stock fuel rail and stock lines in the truck on e85 with a 450 walbro in the tank and never had an issue with fuel delivery. On my blown 306 91 Fox I'm running 96-97 ford explorer 302 rails to clean up the engine bay and fuel system a bit (the return and feed on these rails run to the back of the engine and towards the drivers side) e85 with stock regulator with no issues (MS3 system with fuel pressure sensor). These rails may not work for your needs with your engine being pushed back an inch but just an example for you.