Bucket or bench

My Dart is a bench 4spd car now. I am sending the front bench out to be re done so I mounted one of the van seats I have to move the car around. These things together probabally don't wiegh half what the bench does.
These seats are cool. Now I am thinking Aluminum seat brackets and keeping the buckets,. Any problems with the floor I might run into? Another thing is the floor is mint. Even the thought of 8 new little holes make me cringe a bit but WTF. Any thoughts. pics below

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