Welcome and congrats on the 86. Check out the Mid Atlantic section of the forum and the BiWeekly Fairfax thread. Good group and a good amount of us autocross with Capital Driving Club and Washington SCCA.
Here’s an example of a full STX build to give you an idea of how far you can take it
http://www.ft86club.com/forums/showthread.php?t=129578
__________________
2014 FRS: Sold
2018 Thunder GT: RCE Superstreet 1 Coilovers, HKS HI-POWER SPEC L CATBACK, WedsSport TC105n 18x8