I was pondering this for a while, but I will add my thoughts. Look at the weight for the M8200/9000 vs the M6800. The engines are the same, but the rest of the tractor is not; the M8200/9000 is a heavier machine. Adding an intercooler to an M8200 should be very doable, but adding a turbo (+/- intercooler) to an M6800 will not turn it into an M8200/9000. My fear is that upping the HP without any change to the drivetrain will simply frag parts that are expensive and hard to get at. I think that you'll succeed in getting the turbo on there and function, and then it will work great until suddenly it doesn't, probably pulling something heavy on a hill, likely when time is short.