Fuel issues: lines plugged and smell in cab

[just_ridin]

Hey guys...picked up a '72 beauty for cheap in Atlanta!

the more you look the more is wrong with her, of course, but she's purdy as heck.

Fuel stench in the cab. Obviously a new tank with EEC.

There are 3 lines coming off the fuel tank and routing under the cab to the engine bay, two are plugged.

Wondering a few things here, input would be appreciated.

1) where should the 3 lines be heading in the first place that all's running ok with two of them plugged?

2) Any venting issues or reasons for the smell to be in there so strongly with new tank/sending unit other than a bad seal/gasket on the sending unit?

new sending unit along with the fuel tank, finally getting the seat out to have a look at everything and see if the moron who was in charge didn't get the seal right on the sending unit (hopefully simple cause for the stench).

Really hoping for answers on the 3 lines/2 plugged bit.

thanks!!