Hi
The 6.2 is a large heavy motor,anything is posible if you like a chalange and have good mechanical skills.
I did see a ranger once with a factory diesel motor,probly scarce as hens teeth.
If you are using this just as a comuter i would look for a smaller motor,less work to shoehorn in and probly get better econamy.
Good luck,and keep us posted
Thomas
90 Chev 3500 c/c 4x4,6.2na,400 auto,4:10 gears.DSG Timing gears,main girdle, isspro tach, pyro,boost,oil and trany temp.Dual Tstats, High volume peninsular pump,on shelf, Custom turbo and intercooler 85%complete. Change of plans for the dually, it's going to get a Cummins. Both trucks are Blue 90 4x4 crews