Hi Frank,
I have most all the FSMs here in paper from 1971 to 2003, $1600 worth of them as well as a dozen factory CD manuals. They show the 3K and the Diamante having high compression and long cams and the trucks with low compression and short cams.
But other writings such as the CAPS contradict that. I have the latest CAPs being delivered today, that will not change the old info though.
We need to verify what is actually in the engines, my schedule just got messed up so I might have a few hours off that I can open up my old wagon motor.

Cheers, Charlie
If It ain't broke, Modify it!
87 Montero turbo Converted back in Spring1989
95 Montero SR 3.8 DOHC Only one?
93 Pajero 3 door 6G75 Mivec with paddle shifted 5 speed
Then a Gen2 SR with full coil independent suspension.