i've just bought an engine thinking it was a 18se to stick in my sri to replace the tired engine that's in there. but i've found out that it's a 2.0l and it's got 20e on the head but can't make anything out on the block coz it's been rusted off. so how many bhp has this engine got compared to my 1.8l? also will will fit just replace my old engine and work on the old AFM etc? also will the flywheel of my 18se go on it?