The parts store is wrong. It is mounted on the firewall in the engine compartment, but should have a line on the bottom and line on the top:
here is factory part number that they can cross-reference: #16010S01A32
ok, you need to provide the 17digit VIN and let me check by that. Also, is this an Honda in the US, or overseas?
Are both the lines metal where they connect to the fuel filter?
Ok, according to the VIN you gave me, that is a 1990 civic, not a 1996:
and both lines are on top as what you are describing:
here is factory part #: 16010SH3K51
Loss of power on incline only can be from a dirty/clogged fuel filter, but can be caused by restricted exhaust(converter), incorrect air/fuel mixture.