Hello everyone

I start my project 2 years ago, in w201 instaled 3.2 m104 engine with supercharger of c32 amg. i was blowing 0.6 bar. it was 260 whp on dyno.
I machined piston 2mm from center for decompression.
than i chenged supercharger with turbocharger and blow there 0.8 bar, my acceleration was 100-200 kph 8.1 sec on racelogic.
but some day I had bearing knock and my engine gone wrong, as I think the reason was few oil level in engine .

now I want instal m104.980 3.0 engine, but i don't want machine pistons for decompresion, i was searched copper head gasket 3 mm but not found who will make, turbobandits don't have for this time.

so if anybody knows if I can instal pistons of m103 3.0 engine for decompresion ratio, becouse as I see bore size is idential.