The 4D55 & 4D56 (2.3L and 2.5L) are great Small Truck Engines, There is also a 4M40 (2.8 & 3.2) would be good for a bigger badder small truck and mid-size trucks

The 6DR5 is a Inline 6 that was available in very rare numbers in the 1977 / 1978 Full Size Dodge D/W trucks, 240ci (if i remember correctly), Naturally Aspirated and a bit of a dog because of that.

Beyond that i'm not as familiar with the other Mitsu Diesels.

 

The 4D55 & 4D56 (2.3L and 2.5L) are great Small Truck Engines, There is also a 4M40 (2.8 & 3.2) would be good for a bigger badder small truck and mid-size trucks

3.2L 4m41 would be reasonable for a f150, ram 1500 or silverado 1500... the 4m40 is something that i would prefer to avoid...

 

I've seen the Mitsubishi Fuso motor's swapped into full size trucks.

 

fuso fe

Look for a Mitsubishi FE. They are the same size as an Isuzu NPR. They have a 4 cylinder engine about the same size and weight and power rating. I have 2 4D34t, one 91 one 92, 3.9 turbo intercooled with an inline injection pump rated at about 135 hp.

 

I would avoid all their small IDI engines. That's basically the 2.3 (4D55) , 2.5 (4D56) and 2.8 (4M40). They all have issues. The 2.8's eat fuel injection pumps (I know two owners, 4 pump rebuilds/replacements) and glow plugs. The 2.5's blow up often enough that when a local companies Delicia van popped it's top there were no replacement engines available nationwide. The van had to be scrapped.

The 3.2 is direct injection as is the later EFI 2.5. They're supposedly good engines, but I don't like what they come wrapped in.

 

i didn't remember those 4d56 to be offered as idi engines... my grandpa had a mechanically-injected one and it was directly-injected... but the 4m40 is reported to be the worst mitsubishi engine...

 

The 4D56 was available in quite a few different forms over the years. The earliest models were VE Pumped, IDI, Non-Intercooled, followed by an Intercooled IDI VE Pumped model, followed by the SOHC & DOHC Direct Injection Common Rail Intercooled and Non-Intercooled models. (prior to the Common Rail models, all 4D56's were SOHC with Adjustable Roller Rockers)

 

They sure are proud of the FE motors on fleabag. $3000.00 up for the most part.

 

You can buy a whole truck for that price or less.