Qualifying, Ladder, and Tree Information
Limited to quickest 16 qualifiers. Sportsman Ladder. .400 Pro Tree
Open to all year, make, and model vehicles. All vehicles must be stock bodied and stock appearing. Minimum race weight including driver 3000lbs.
Engine & Drivetrain Rules
Must have LT1 based engine (Factory LT1 Block). Cylinder heads must retain the factory 23 degree valve angle, Trick Flow 21 degree heads permitted (TFS-30400008-M54). Aftermarket heads and converted small block Chevrolet heads will be permitted if they follow the above guidelines.
Aftermarket EFI PCM, LS1/24x PCM conversions, & Carburetors are allowed with a 100lbs weight penalty.
Gasoline or E85 Only.
Any GM transmission allowed. Torque converters not permitted with manual transmissions and clutch activated automatic transmissions are prohibited. Line locks, trans-brakes and two-steps allowed. Throttle stops, delay boxes, and auto shifters prohibited.
Any automotive rear axle permitted.
No Power adder or power adder equipment allowed on/in vehicle during competition of this class.
Wheels & Tires
Any automotive wheel permitted. Tires must have a maximum height of 30” and a maximum tread width of 10.5” for bias-ply and radial tires.
During competition passes, all vehicles will be required to weigh after each pass. Vehicles under minimum weight will be disqualified.