From the most current Lone Star Legacy rule book
Shocks
Only one, nonadjustable, stock, steel, QA1 7564, which is a 75 Series Steel chrome plated, twin tube shock with a 6" stroke and a #4 valving rate, or the Pro Shock SB 64, which was legal under the original Allison Legacy rules and prior editions of the Lone Star Legacy rules, is permitted per wheel. The only adjustable device allowed on the shock is the spring adjustment nut. No revalving or altering of internal components of stock shocks permitted. No custom made or “tiedown” shocks permitted.
1. Springs: Only 17/8” inside diameter, 10” long, steel coil over springs permitted. The spring must be mounted in coil over form over the shock.
2. No sway bars on the front or rear permitted.
But check with Jason Simental “Getzum” on here for clarification.