Hey man,
Great shop in calgary would be RCTS Canada. Reg, the owner, can tune stock supras to insane horsepower just by tuning. He would be a great bet. Also Reimer tuning has an all wheel drive dyno so thats always helpful. Motor build i would consult with RCTS and Davenport Automotive. They are familiar with insane horsepower corvettes/muscle cars in general, but smart!
Good luck.