I may need to call a little BS for a few reasons.
IHI, no cooler, & stock fuel pump all sound like it will struggle to hit the 16's.
Why did it have an IHI?
What programming was he running to use the big injectors?
How did he spray a 150 shot with the stock fuel and it live anyway?
I'm intercooled and have a very stout fuel system and could not spray a 150 shot without popping head gaskets?
Finally I don't see a C3 trans being able to take very many 14 second runs, let alone the weak 7.5" IRS rear.
It must have been a very special car.