you have 2 option ... chase down a two line hose and connectors and.. .the 2 line hose thank which works with pressurized air from the motor.
the alternative is to modify you 5.5 for single line operation by installinga single line side connector , modifying the pressure system and mounting a smal pressure pump which will pull fuel from a modern tank instead of the old way of pusing air in the tank to have the fuel return up to the carb ...
sounds a bit complexe but isn't see utube
