Mounting Late model Buckets in my 68 Dart - issues

I recently bought a nice set of bucket seats out of a 2005 Scion TC. The seats only have about 10K miles on the cause the guy took them out to install racing seats.
I think they will go good in my dart. They are very comfortable and are black with black/blue inserts which is perfect for my black and blue interior.

Ok, so the problem is the raised up sections of floor along the outside of the floorpans. Where the original bench seat was bolted down.
As you can see in the pics, on the drivers side the seat will mount just inside the raised section and only interferes with the seat mounts in one spot (I could notch the raised section) and I could bolt them in.
However on the Passenger side, theres less space cause the transmission tunnel isn't in the middle of the car. On that side the hump has got to go !

As I see it my options are: Cut these raised sections from the floor and weld in flat metal.
or Build some raised mounting brackets for the seats to get them above the raised sections of the floor, but I think that will end up placeing the seats higher up than I want them.

If cutting the humps out and welding in flat metal was all there was to it, I'd be doing it right now. But if you look under the car, there are big metal brackets welded to the floor and the rocker that add support to the raised section of the floor (to support the bench seat). So this option is starting to look like a pain in the butt.

Any suggestions ? Or How have you guys handled this problem ?