mine was an original 383 4-bbl '71 Charger 500 too, but has a '72 bulge hood.
Start with EFI Fuel tank, Tanks Inc TCR10-T $295
1971-73 Dodge Charger, Plymouth Road Runner Fuel Injection Gas Tank
Need the fuel pump Module that fits that tank, with the correct pump for your setup. The GPA-4 uses the 255 LPH walbro pump that is pretty common up to about 550-600 HP NA on gasoline. If you plan to run E-85 fuel, there are some pumps designed for E-85/flex fuel and in higher outputs.
The GPA-4 module is $220
In-Tank Fuel Pump Module - GPA-Series
Fuel level sending unit is $40. I don't know what the correct ohm range is correct, best to call and ask?
5 Bolt Fuel Sending Unit
I prefer running the fuel system with the return line, but that is an extra line from tank to EFI regulator.
I use the stainless reproduction fuel lines, 3/8" supply and 5/16" return to run the length of the car. The line ends are adapted to -6 AN fittings for the flexible lines to the tank, filter, and regulator. Plus the -6AN line from filter to fuel rail.
Most aftermarket setups will just have you run the braided hose the entire car, which works fine but dosen't tuck under the car as well.
The Copper-Nickel lines are also good and easy to shape, and less expensive than the pre-bent stainless lines.
EFI kit may or may not come with a filter. Most use a generic GM filter with AN-6 to metric O-ring fitting (I think 14mm, but not sure?)
Kit will come with an strap-on the exhaust O2 bung, but I prefer to have the O2 exhaust bung welded on.
For the actual Throttle Body EFI, use one that can control ignition timing to get the full benefit of the EFI tuning.
I think the Holley Sniper Version 2 is supposed to be a much improved version of the original sniper, which seemed to work fine on the one I setup, but it used the sniper distributor and ignition HEI box.
My Charger had the old Fi-Tech 1200 PA unit, which is working good too, but tuning seems more cumbersome. On the positive side, it works with a factory lean burn distributor, so no need for a pricy distributor.
I have an original Sniper for my 360 engine and I plan to try running it with the stock electronic distributor after locking it out, and re-phasing the distributor reluctor wheel which will re-phase the rotor to pickup. I hope it works like it did on the Fi-Tech because they charge alot for the Holley and MSD Distributors.
