ok the oil sender is on the exhaust side of the block, its under the coolant pipes.
the coolant pipes need to be replaced with a us spec one or you can do what i did and by pass the heater
i went from the top of the head to the lower coolant pipe. then the top coolant pipe goes to the other on the head.
your thermostat housing needs to be changed with the us spec one. in the top pic is the jspec one. the bottom one has the us spec one. the u.s. spec one has vaccum lines goin to it.
the throttle body also needs to be exchanged for a us spec on because the linkage is different. YOU CAN USE THE JSPEC ONE BUT YOU NEED TO MAKE THE THROTTLE LINKAGE WORK.
and if you will need to put an egr valve on there along with a egr cooler plate on the back of the head if you have to pass emmissions tests.