Is it possible to replace a blown 3800 supercharged with a non supercharged 3800 in a 2002 SSEI? oh and by the way I am an SE member

you would have to swap the PCM and such, IMO its possible, but why would you want to do that?

it is possible....

you need the Engine Trans, PCM and the wireharness from the donor car....there are also things like the fuel pump that need to be considered...

It is better to buy a donor car so you have all the parts right on hand

Yes, the only thing that will need to change is the PCM and the accessory brackets I think.