I have a fuel cell in one of my Galants...I believe it is this one:
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There is a handful of fittings involved to include a (I forget what it's called) bulkhead fitting for the vent that closed when the car is rolled over. Also a 255lph Walbro inline pump.
It's installed in a car that I am parting out right now...I should be able to get pics sometime this week when I finish taking it apart.
I cut out the bottom of my trunk to mount it. I was going to weld a plate across the hole then remount the cell but never got around to it.