I spent half on guages and pod.
#11 fuel plate: $225 at the time (slid half way forward: FREE)
3K GSK: $125
Advanced timing to 16.5* and gov. lever adjustment: I traded a chord of firewood to a good friend and serious diesel head for the use of his garage, tools, help and supervision.
I swiss cheesed the bottom of the airbox, but I don't think that helped at all.
The clutch did start slipping, and I was convinced it was due to the power, but after getting it apart, the mechanic found the throw out bearing was leaking grease and flinging it everywhere including on the clutch surface.
Piers has plates at $195 now.