for those interested here's the stock class rules.
6.3.9 SUSPENSION
6.3.9.1 Wheelbase must remain within 3" of stock, as originally manufactured.
6.3.9.2 Suspension configuration must remain stock, as originally manufactured (meaning that leaf springs must remain leaf springs, coil springs must remain as coil springs, torsion-bars must remain as torsion-bars, etc.).
6.3.9.2.1 Leaf springs may be replaced with any leaf springs and may be installed in any location and orientation, with the following limitations and exceptions: Leaf springs must be connected directly to the axle assembly, unless otherwise factory-equipped. Links/linkage may be installed, but the leaf springs must be capable of locating the axle assembly relative to the chassis in any direction without the use of any such links/linkage. As such, quarter-elliptical springs, transverse leaf springs, and the use of double-shackles (at the forward and rear leaf spring mounting points at the chassis) are not permitted, unless factory-equipped.
6.3.9.2.2 Coil-springs and related suspension linkage may be modified or eliminated and replaced with any coil-springs and linkage, and may be installed in any location and orientation, with the following limitations and exceptions: Coil-springs must be connected directly to the axle assembly and chassis and shall not be mounted in any way so as to yield any type of mechanical advantage, unless factory-equipped. Coil-springs shall not be replaced with any type of coil-over shocks, unless factory-equipped (if so-equipped, factory coil-over shocks may be replaced with aftermarket coil-over shocks).
6.3.9.2.3 Secondary suspension is not permitted, unless factory-equipped (secondary suspension is considered to be any means or method of supporting any portion of a vehicle's weight and/or affecting the primary spring-rate at any time). As such, springs of all types, airbags, air-shocks and air/nitrogen-charged hydraulic bump stops are not permitted. Compressible bump stops made of rubber, foam, or other similar materials are permitted, with the following limitations and exceptions: Bump stops shall not have any affect whatsoever on any aspect of a vehicle's performance outside of the last 2" of vertical wheel-travel (on compression).
6.3.9.3 Shock absorbers of any make/model/type are permitted and may be installed in any location and orientation, with the following limitations and exceptions: Only one shock absorber is permitted per wheel/tire (not including spare tires). Shock absorbers shall not be larger than 2.65" in diameter (outer diameter of shock-body) and shall not be capable of any more than 14" stroke. Position-sensitive shocks (including bypass shocks of all types) are not permitted. Shock absorbers must be connected directly to the axle assembly and chassis and shall not be mounted in any way so as to yield any type of mechanical advantage, unless factory-equipped (mounting shock absorbers off-vertical is permitted and shall not be considered a mechanical advantage).
6.3.9.4 Manual suspension controls (e.g. forced hydraulics) are not permitted.
6.3.10 WHEELS
The TJ is Mel's, I have ridden in it, I have turned wrenches on it, I am simply one of the crew.....and of course in the case of a podium finish, we fully expected for other racers to challenge the design by throwing the rule book in front of Mel's suspension design. That's also part of racing, no one likes getting beat, not everyone is a gracious loser. One of the best parts about being associated with the Discount Tire/Off Road Evolution race team, everyone is having a blast, everyone is a volunteer, everyone shares equal parts of the loss and wins
