Curious on the Diesel swap how much effort was that did a quick google search not a lot of details as to how people have done it.
there are a few diesel swap threads on this site in regards to the vw engines. for normalish trucks this seems the best setup to use.
for larger trucks...as in lift and tires...the 4bt or larger engines ... om benz models...ect are pretty good.
my truck has a humvee 6.2 engine currently...these are gm based for the most part for their pickups....and it is actually a detroit diesel.
there are marine, delivery, agricultural, power generation and military applications. those are larger in number with various accessory options..
regardless they are light duty pre GEP redesign. they are a v8 and harder to package
effort is tough to define for a guy like me.
goals and expectations are key. there is not much to it for the older mechanical engines. especially naturally aspirated...this is why details are lacking... you make mounts.....and hook up fuel and coolant systems...charging system....and transmission....which generally are left intact from a running donor so its pretty simple.
you can plan on modifying oil pans or repackaging turbo and cooling systems generally speaking...
if you want it to look factory...expect lots of time and money.
if you want it to save money on fuel....so you can spend more money and time fishing and travelling....it will look like mine. a horriffic trainwreck that will take you where you need to go. some guys take years to do a swap....some guys take days to do a swap...