I used seats from a 2005 Scion TC. As for mounting, I did it the hard way. I cut the factory humps out of the floor and welded in flat metal, so I had a flat mounting surface to start with. Had to modify the tracks a little bit at the front. If I had it to do over, I would build a framework out of 1" square tubing to adapt the Scion tracks to the factory floor. Actually thinking of making a framework under them now, just to raise them up a bit.