1965 Dart 273 fueling options

Find a 65 4 barrel intake or a D4B Edelbrock. A 600 Edelbrock works good. Either that or find some #920 heads (1966 closed chamber) and you can use a normal small block intake. Magnum heads are another option but it takes special lifters and pushrods and some other parts to make it work. I don't know about EFI. No reason why it wouldn't work.