Upgrading to Cummins EFI generator from same model evap

Assuming this is on the input side of the fuel pump, it should be fairly easily possible to get some sort of an adapter or fitting to connect your existing fuel line. Perhaps the easiest way to get an appropriate part would be to drive the motorhome to an auto parts store and show the clerk your gozinta and gozouta and get the right doohicky to connect them up.

EFI sounds like a very nice feature for an RV generator.