what motor for my rc8

Well i might be getting a truggy so my 2200kv castle motor will be swapped into the truggy.

So what motor would you pick to run in my rc8 buggy.
Most likly i will pick out a medusa but what size and kv should i go with. I want good power about 45mph at the most. It will be running of my mmm and 4s batterys.