Jethrow Been working for GM for over 25 years Here what I have found and run a FI system on my car,
Dead head system is good and bad. Good Only use one line for supply the pressure regulator in the gas tank and part of the fuel pump module Need regulator in system to not blow out lines or damage injectors. Pump pressure can go to 100 psi, way to much. Bad side. The gas in US is getting crappie. You need a fuel filter with better that a 20 micro filter to just keep the big crap out of the injectors. The problem is over time the small partials get through this filter and end up on the dead end pipe and start to lean out the end injectors. Problem is ECU doesnot know this is happening and just keeps adjusting the fuel to stop lean out. When motor gets bad enough the SES light will come on with lean codes. At this time O2 sensor or black and done, spark plugs are fouling, gas in the
oil smell, the list is endless and have seen it all. We have a 2010 Camero with LS7 got bad gas and the whole system was replaced and paided for by customer, he's sueing the gas station for bad fuel. Good luck in this state. $5,200.00 bill for everything.
I would tell you to use a 2 line system from front to back with a pressure regulator on the fine line of the return. #8-#10 supply line and #4-#6 return line. If you add on down the road a turbo or supercharger you have the supply system to handle a 1,200 HP motor in place.
Evap system you will need to have both the purge valve and vent valve working in the system. The system will need to hold vacuum of a couple of pounds or fail evap test and you get a P0442 or other codes for evap system. Vent soleniod will be in the back of the car. Need a fresh air hose to it with filter to keep out debrie from road,dirt, or water. All these hoses should be plastic. Methonal or Alcohol will break down the tubing if rubber and cause all kinds of problem with the fuel system. SS hoses with tephlon inner hose is needed.
For connectors, both Jegs and Summit have everything you need for this with lines and connectors. I like screw on connectors over clips with "orings" Need a yellow tephlon tape that will not be effected by fuel to seal connections. Same for "o" ring on injectors need to use green or blue seals and gaskets.
Charcoal canister needs to match the motor and evap system. Would look for a S, or T truck to help you for this problem. Large enough to handle system but not that big to not fit under car. This will be you other problem of where to mount it and clear everything. You have your work cut out for you. Some of your friends down under may be able to point you in the correct direction on this. You will need to run wiring to this, pressure sensor in fuel tank also.
Easiest thing is to convert to pipe thread and then to NPT couplers for fuel lines. Hope this helps Rick L.