Change to another differential
 

Hey!

I´m going to transplant a 2JZ- GTE in my RX7 FD.
And i need to registrate my car to a "modified car" to drive it legally here in sweden.
and to do that i need to change the differential to something else, is there anyone who knows if there is a car which is fairly bolt on to RX7 FD? or a whole subframe?

all answers are appreciated!

And sorry for my bad english !