[Eirik 400 SE]

O-M-G....
Thats sick, insane, cool, crazy and quite remarkable.. Really!
Must have taken a few hours that, yes ?
I also guess you won't be putting things back in, because that will be even more job..
You propably could loose a lot of weight by replacing the side windows with the plastic-kind-a-wondows they use in racing..

Another thing, lots of plastic under the car, along the floor and wheelhousings, that could be filled with old road-dust.. That's also heavy..
Just had my rear bumper of, for sandblasting a few small brown spots, and found a couple of litres of dirt inside the bumper and other plastic covers..

 

[Eirik 400 SE]

Yepp, seats are important.. I won't recommend driving around sitting on a wodden block..
I've tried it once.. In a small but very potent car.. Put a little pressure on the gas, and the car took off, leaving med hanging from the steering-wheel.. Almost took out a complete postbox-rig.. My feet were also lifted from the pedals so the speed decreased very fast too..

If you bypass the heater-matrix, I guess you could get a huge load off by removing the heater-system ??