When you swap a turbo motor in you have a couple of options for clutches if you have a standard tranny.

The 88-89 Starions used a larger diameter disk, pressure plate and a flywheel with a bolt pattern to take the larger pressure plate.

This clutch is nice since you get more surface area to absorb heat so it takes a bit more slippage when climbing rocks before it gets too hot. The complete unit is a bolt in.

The down side is it takes a bit more pedal effort.

The stock montero clutch will hold moderate boost levels when it is in good condition. 14 psi boost would be pushing it and if you tow it may not last very long with the added load.

The stock montero 4 cyl clutch is the same size as the 87 and older Starions.

Kevin C