The pistons are different(higher compression) in a de compared to a det so you could not run the same boost as a det bottom end.

Also its not just a case of boltding the turbo to the manifold, You need to tap the de block for oil feed and return as well as coolant return(although non vvt engines don't return to the block).

Basically it has come up before...it is vastly easier and cheaper to just get an sr20det.