In this first pic my question is does it matter how the rails are plumbed? Due to how I am going to have to route the fuel lines I was thinking about following the frame rail like factory and mounting the regulator on a bracket off the boss on the front of the cylinder head. And have the inlet to the rails start right behind the alternator and have the crossover line towards the firewall and plug the end by the A/C compressor.

In this second pic you can see how close the rail is to the A/C compressor I don't think anything but a plug in the rail here will work. There is only one inch clearance.

Here is the regulator I am using. The way I understand it if you are using a regulator before the rails this should work? First custom efi setup would like to not mess it up. Thanks