Hey Coach,
"Compressor" = turbo, same thing - different name. I've got an 84300D and even there adjusting the preload on the wastegate spring is a pain. There are lots of aftermarket boost controllers that you could plumb in. I just cut the rubber hose from intake to the wastegate and installed a simple brass needle valve. Then I loaded the engine per the manual (about 2500 rpm, full load, in 2nd gear, I think) so that max boost was about 12.5psi. Spec upper limit is around 14psi, maybe 15 psi. Made sure that 12.5 was the highest point even as boost spiked with shifts under load. Then I turned the ALDA screw a total of 1/4" turn so the injection pump would provide extra fuel to go with the extra boost. Much better performance all around. The Unimog looked really cool in those pictures...now that's what I call an ATV!

Fre