Prodrive are one SERIOUS outfit. I think they have about Five World Rally Championships under their belt (Subaru) and the 550 is kicking ass in the FIA GT Championship.
Best thing is they're British. Might be quite sweet to get a placement with them over summer.
The Ultima is really designed for an American small block V8 (like an LS1 or LT5... either would be beautiful in that car), I'm more interested in fitting a four-rotar Mazda race engine in there.