Guy over on Pistonheads is making this at the moment.
He's basically taken his NOS equipped Lexus LS400, cut the body off, and is mounting a Renault Espace body onto the frame.. NUTS !!!
Loads of weight has ben removed from both shell/chassis, so should be pretty lightweight with the power available, coilover shocks, upgraded brakes etc... It's far from finished but should be quite fun.
Lexus V8 and chassis
http://thumbsnap.com/EO6a11nQ
Espace body
http://thumbsnap.com/TOnsD1uE
Voila !!!
http://thumbsnap.com/3WkwPYLb