hi i have an ej20e sohc engine and i have recived 2 donor cars 1 wrx turbo 2 turbo 2000 awd for legal reasons i canot use the engine blocks from either but all the rest is fare game , is it possible to change the heads over from sohc to dohc also using the turbo

 

The basic blocks are the same but you will need to change the pistons to get the CR down for the turbo. Heads will fit when used with the correct turbo head gaskets and head bolts.
Cambelt,idlers and water pump need to be swapped along with the Modine.
Then the ECU,wiring harness etc etc etc.

Mick