Mostly manufacture VERY close tolerances and boost the hell out of it. Might have had a different head with larger valves, etc, too, but I don't know that for sure.

I believe the bottom end was stock.

I also don't know how long it would run -- probably not 250,000 miles at that horsepower output!

Don't remember the numbers on the powerstroke right off my head, but it's not 300 hp or 400 ft/lbs of torque, and the rpm limit is something like 3000, not 5000. If you can get more power out of it with a computer chip, it's detuned as shipped.

Peter

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1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!