That motor is not meant for a turbo at all. Poor vehicle choice for such an undertaking. You don't get more power out of a diesel by just turbocharging it, you also need to supply more fuel and air etc, which increases temps, and then melts the engine, since it was never designed to have a turbo.

I'd choose another car. Why would you want to wreck a classic diesel like that

Even the turbo Mercedes models from the 80's only run at around 11-13psi of boost, and those engines are specially reinforced and modified to take the additional stress of such operation.

__________________
-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 118k - mine - (OC-123,800)
'17 Metris(VITO!) - 37k - wifes (OC-41k)
'09 Sprinter 3500 Winnebago View - 62k (OC - 67k)
'13 ML350 Bluetec - 95k - dad's (OC-98k)
'01 SL500 - 103k(km) - dad's (OC-110,000km)
'16 E400 4matic Sedan - 148k - Brothers (OC-155k)