Re: Powerstroking a Ranger?!?!?!?!?
First, Banks makes some good systems, but an ordinary tuner will easily add 200hp and 350lb ft of torque. First, you have to look at what you have to work with. As you said,you'll have to strengthen up the entire Ranger platform. The PS 6.0L might not fit between the wheel wells without some modifications to the chassis. The rear axle will have to be upgraded to handle the torque as well. I imagine you'd have to push out the rad a bit, and upgrade that so as to properly cool the engine. You might get away with mounting aux rads sideways should that be necessary depending on the level of tune you want to set the engine at. Putting a full size powertrain into a compact package is of course, all custom work and it's costly, which is why you won't find much info on the subject. Still, if you have the time, cash and patience, I suggest on going with it because we all know it can be done.
On a side note, I know you won't want to hear this, but the Cummins I6 would be a much better fit in the narrow engine bay. It would allow better cooling, and as you'd have to remount the rad (possibly increase the front end length even with the PS engine), it makes the most logical sense and even mid mileage engines can be had for low cost, and parts are a plenty.
After you read up on the PS 6.0L engines, you'll be best to put in a 7.3L as it's much more reliable and there are plenty of aftermarket parts for it. If I'm not mistaken, earlier 6.0L V8 diesels had injector problems, and bedplate issues that was later resolved, but the injector problem was never really fixed...hence the newly designed 6.4TD.
'00 Durango R/T 360ci 290hp (modded); 138,500m
'06 Pontiac G6 GT 3.5L 220hp; 44,000m
'12 Chrysler 200 Limited 3.6L 283hp; 13,000m
'99 Taurus 3.0L 2V Vulcan 145hp; 154,300m - Traded
Amsoil in all vehicles!