I am also considering the LMM duramax swap, now that all the bugs ? are out of the kits available.
I Really enjoy the simplicity of the 6.5 TD but it just doesn’t have the power to move the truck around.
At off highway conditions 6.5 is more than enough, on the highway I can comfortably drive 70 mph, but as soon as the grade changes truck slows down to 45 ? ?♂️
I guess that’s true with almost all old school 4x4s, land cruiser, jeep, Land Rover etc.
I currently have over 270.000 miles on the 6.5td @5psi boost.