Hi Guys.

I currently have a M104 3.2 which im in the process of turbo charging, at present its running a auto box which i believe is the 722.5 iv read that these are quite prone to failure once turbo'd earlier on? And are the weakest however i may be wrong.

The engine once installed will be running standalone management so no issues with the auto box wiring, im in the UK and wondered what gearboxes and flywheels are interchangeable? Im looking for around 350-400 bhp eventually and would like a box that could take that power.

Iv also read on here the 2.5 16v 190e gearbox is one of the strongest and i know these are quite readily available in the uk, failing that possibly a 300d box?
There are in the UK a lot of diesel manual boxes available at good prices so this is also an option?

Im new to the world of mercedes and picking things up along the way, so excuse me if some questions are basic mercedes knowledge

Any help is appreciated, Cheers.