Re: Newer F250 - Older Diesel Engine Swap....
A hand powered rail car comes to mind... limited only by the amount of track, and the direction in which it'll take you.
However, if you want a pre electronic diesel, good luck in finding one that still runs. Most states will want emissions compliance anyway, unless you can find a late 70's model with decent mileage and only moderate rust, then you'll be lucky. But putting an old diesel into a modern(ish) truck, won't work as the new trucks, down to the gauges are electronically controlled by the PCM and such. Keep shopping.
'11 Ram Quad Cab 4x4 SXT 5.7L HEMI (stock); 48,500m
'06 Pontiac G6 GT 3.5L 220hp; 64,000m
'12 Chrysler 200 Limited 3.6L 283hp; 28,000m
'99 Taurus 3.0L 2V Vulcan 145hp; 154,300m - Traded
Amsoil in all vehicles!