Hi all, this is my first post. I'm considering a swap from my n/a EJ20 engine (sohc) to a EJ25 shortblock. And I'm in desperate need of some info ! 1. can I re-use my EJ20 sohc heads ? 2. will all other things still bolt on ? Like my intake manifold, exhaust manifold (MRT headers for n/a impreza) , ...