What about cutting the crap out of the trunk bed and replacing it with a nice flat peice of aluminum sheet metal?
Be easy on me, i'm not familiar with welding.

Aluminum is a lot harder to weld than steel. Sorry if you already knew that and I'm stating the obvious

What'* the benefit of that? That'* not gonna be really had to do as long as you can measure and cut really well......And the welding part is just a minor set back.

Why not just remove excess weight. Sound deadening material, The interior...

Racing Buckets are a lot lighter then ours for example.

Pain in the *** to weld steel to aluminum also....They have 2 separate melting points.

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!

Yeah that makes good sence.
How bout bolts and sealer?

Bolts and sealer would work, but would look tacky unless you have a good way to cover them up. It'* not impossbile to weld steel to aluminum....But it won't be as easy as welding steel to steel. Also wouldn't be a clean weld I don't think.....I'm not an expert welder by any means, but I do have some experience.

I'm not worried about tackyness when it comes to my trunk. My bike goes in there, that'* about it.
Now does anyone know what'* hooked up to the same metal underneath the car?

I think an exhaust hanger (maybe) and a I think the fuel tank straps?? Depending on how far up you go....You'll have to crawl under there and look for your self, because we really don't know how much you wanna cut.