Four stroke engine to replace 6-71?

[H3Jim]

You might check with Southern Oregon Diesel.  they have an MC5 they are re- engining.  I can't remember what exactly he is putting in there, but it may very well be a 4 stroke.

[TomC]

When I last talked to Southern Oregon Diesel, which was about a year ago when I was starting to plan for my turbo job, they said they were no longer doing repower jobs.  They will overhaul you existing engine, just not change to a different engine.  Although- they may consider the 6V-92TA swap since it is the same engine on the outside-just have to plumb up the turbo, enlarge the radiator, air cleaner, and muffler.  Good Luck, TomC

[H3Jim]

Its true they are not doing repowers, too much trouble and and especially liabiility for what its worth.  But they may have some suggestions for you as to what is a good engine to put in there, especally since they have one they are doing themselves.