How rare is this?

Hey guys, ive managed to scoop up an imported sunroof manual awd wp11 autech primera.
Just trying to figure out the rarity on these, anyone know how many where made? I cant seem to find info on them anywhere.

Also, when doing a srve to det block is there any other modifications ill have to make apart from the ecu? and does it technically make it a sr20vet? its a motor from a u13 bluebird. Keeping it AWD.