I dis know that welding aluminum is harder but i wasn't sure if it would weld to steel.(something i could look up but i'm lazy)
The trunk floor is pretty big esp with the spare tire ditch. If you cut all that out and replace it with aluminum, that'* gotta save some weight. Even better it'* over the rear wheels.
My trunk right now is bare metal with the seat foam poking out.
I already removed all my carpet padding too. (hard to tell)
I'm kinda weary of converting to racing buckets though.
And i'm not trying to alter the interior that much at all cause it'* noice!