Mr. Smoky is owner of Top Secret :S
First of all that Supra isn't TOP SECRET crazy. Thats Smokey Nagata. He is know for his speeding in Japan. But he does have a rival named Chiba. And that Supra is not Skyline powered. I've seen the car personally.
if i am correct.....and it is the famous gt300 wide-body top secret supra. that thing is not running a rb engine nor a 2jz......its running an mr2 e ngine rated at 700 hp!!!!!! if its not the wide-body top secret car then n ismoboy is 100% correct it would be running an rb30
Ive heard that that supra is powered by a skyline engine :)