When I went down this path a couple of years ago, I found them for sale in NZ for as little as AU$120.00, but by the time it got to Australia it was over AU$1000.00 because it's heavier than 20kg and therefore NO post shop in NZ will accept it, no matter what the NZ Post web site says, the shops/outlets WILL NOT ACCEPT IT.
So! you have an alternative, ship it by AIR or SEA?
Air, it's got customs duty, insurance, minimum weight, terminal charges etc etc etc and as I said it's over AU$1000.00 by the time it gets here.
Sea, same sort of deal because you get charged a minimum of 1cu mtr in the container.
Scott, there are much easier ways of getting the torque & power this L31 can produce.
For starters, if your going to turbo it, you need an N42 block, not F54 as is perceived. You have to take this block 3.0mm o/size to 89mm and the F54 bores become far to thin and become porous, allowing coolant and oil to seep through the bore walls when boosted with as little as the factory 8psi.
I recon I'm going to get 500~600Nm torque from my 2818 motor (plus 1.0mm o/size to 87mm) and 200+ Killer Wasps at the wheels on less than 10psi.
Why would you want more than this?
Make it handle and stop and you have a potential GTR killer in a classic R30. In my opinion, the dollars are better spent on handling options, brakes & tyres to get it to the ground.
Cheers, D