Which, doesn't do anything. As is the nature of TB spacers.
Renix performance is somewhat elusive. I mean, you can run a aftermarket header, no exhaust, and a HO head and the newer manifold (2000+ IIRC), and you'll still only be a little over 200 Crank HP. Not wheel HP. That's about 140 to the ground.
But, if you really want to spend the dough and make it scream, yeah, it's possible.