Got the call from my refinery buddy telling me gas is going to $8 a gallon and suggested I do my fuel injection conversion early on my 1972 340 Roadrunner and 1972 Charger Rallye with 400hp small block. I’m not sure what I need, do I get just a carb version like sniper from Holley, or are there diffrent choices? I won’t save a bunch on mileage, but when I do long trips to shows, at least I can save a few bucks while getting better mileage and easier to operate fuel system. Specks:

340 stock rebuilt to factory specks with 50, on rebuild

5.9 Magnum crate engine with cam upgrade to 400hp and on 800 miles on the engine.
Any ideas are appreciated.