Searay86,
This is an excerpt from the 2019 SCCA Street Class Rules. You can find the PDF on the SCCA website. The Street Class rules start on page 73. Rules for shocks and struts start on page 78:
****13.5 SHOCK ABSORBERS/STRUTS
A. The make of shock absorbers, struts, and strut housings may be substituted providing that the number, type (e.g., tube, lever, etc.), system of attachment and attachment points are not altered, except as noted below. The interchange of gas and hydraulic shocks absorbers is permitted. The following restrictions apply: 1. No more than 2 (two) separate external shock damping adjustment controls are allowed. This permits the use of shocks which originally came with more than two external adjustments, which have been converted to double-adjustables, only if the additional adjustment controls have been permanently disabled (e.g., via welding, epoxying, grinding off). Gas pressure adjustment is not considered a damping adjustment.****
That means any of the single-adjustable shocks from Tokico, Koni and other brands are fine. I have had a lot of success with Tokico llluminas and D-Specs over the years. They are hard to find now, so most people are using Konis. You want to be able to adjust the shocks and struts from the top so you don’t have to crawl under the car between runs.
I’m happy to help with any other questions you have.