Toyota's naturally-aspirated diesels do not take too well to turbos unless they are low-pressure units. When pushed they tend to overheat.
My opinion, of course. I'm sure there are those that will disagree.
In your opinion what’s my best option for a 5 speed diesel swap for an 80 series. I’m looking to get better mpgs out of my cruiser. Currently getting a max of 12 average here in DFW.