To the OP,
Just DO IT! I know the turbo has piston squirters and slightly larger wrist pins etc etc, and we can go on forever about the many rather minor variations of these engines, but I personally have run my turbo 240D for about 300K. Virtually all of those miles are blasting down the highway at high power outputs. Granted there was a engine rebuild in there about 10k ago due to sand ingestion, but the engine was very high mileage when I started this little experiment, and its held up just fine. I've run boost up to around 15 psi, but normally stay around 10psi. This gives quite good performance. I can run 75 to 80 up and down the rolling hills of New Mexico with no problem. I did re-gear the car to a 3.07 rear end out of a 300d, so I'm not running out of rpm at those speeds. So far my only issue is the car running hot in the summer. I will soon put in a rad out of a 300 to solve that little problem. If you have any questions, feel free to pm me.
Cheers!
Chris

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1983 Turbocharged 240D
1982 Mazda RX-7
1974 Mazda Rotary Pickup Converted to an EV