I know alot about the US Altima, I currently hold the record for fastest fwd U13 and I also know that is hard as all hell to make a regular U13 regular AWD. I know a guy in Nashville that made AWD Altima and he says that its hard because the frame changesalot from FWD to AWD. Basically a Bluebird just looks a like regular Altima but its completely different when it comes to drive train. I had the same idea a while back of making an Altima AWD but it turned out to be impossible to find real Bluebird drive train parts so thats why I decided to order the real car from Japan and I'm glad I did.