Welcome and congrats on the purchase of what appears to be a very nice 90’. You are correct on the shifter issue. By all means get the C-Beam plates. They really help in firming up the feel of the car.
You live in the land of the “FBI”. Fast Boyz from Illinois. A great bunch of Z owners! Get to know them, Mark Haibeck and Pete “the Greek” and you should never have a worry while having a great time with the car.
Enjoy...
H