Rms street lynx vs. back half parallel 4 link

As mentioned, a triangulated 4-link is more designed for corners. Turbo car with decent power is bad enough...add to that a drag radial and you want all the adjustability you can get. A full back-half not be needed. Figure out what size tire you will run, and see if you can mini-tub the car. From there, you can make/design your own 4-link setup to fit under the car.
On the other hand, if you're not against the complete back half and want to do that, it would be much easier than what I previously mentioned. Let me know if you have any questions when it comes to build time. Good luck.