CLASS 600 PRO STOCK ENGINE-- MUST BE: CAST IRON BLOCK ALLOWED: ALUMINUM HEADS, HARMONIC DAMPER OVER OR IN FRONT OF FRONT AXLE CARBURATION-- MUST BE: OPEN ALLOWED: TUNNEL RAM NOT ALLOWED: BLOWERS, AFTER MARKET INJECTION, SUPER CHARGER IGNITION-- MUST BE: OPEN BODY(INTERIOR)-- MUST BE: OPEN BODY(EXTERIOR)-- MUST BE: VEHICLE IN APPEARANCE WITH BOX SIDES OR FLATBED, SECURE REAR HITCH AND CLEVIS ALLOWED: FIBERGLASS BODIES FRAME-- MUST BE: ORIGINAL EQUIPMENT IN APPERANCE NOT ALLOWED: TUBE FRAMES AXLES-- NOT ALLOWED: NO RELOCATING SUSPENSION-- MUST BE: ORIGINAL EQUIPMENT IN APPEARANCE, COIL SPRINGS MUST HAVE LIMITING STRAPS NOT ALLOWED: 3-LINK OR 4-LINK SUSPENSIONS EXHAUST-- MUST BE: OPEN FUEL-- MUST BE: PUMP GAS - ALCOHOL NOT ALLOWED: NITROUS TIRES-- MUST BE: D.O.T. APPROVED MUD OR SNOW UP TO AND INCLUDING 49.00" NOT ALLOWED: PADDLES, CUTS, SCOOPS OR AG TYPE TIRES BRAKES-- MUST BE: ALL PARTICIPANTS MUST BE ABLE TO STOP BY DISTANCE INDICATED OR YOU WILL BE DISQUALIFIED ADDITIONAL-- IF EQUIPPED WITH NITROUS, LINE MUST BE PURGED AND BOTTLE REMOVED ADDED SAFETY REQUIREMENTS-- - MUST HAVE MINIMUM 8 POINT ROLL CAGE - FRONT AND REAR DRIVE SHAFT LOOPS - ALL VEHICLES MUST HAVE A FIRE EXTINGUISHER MOUNTED WITHIN DRIVERS REACH - A VEHICLE NOT EQUIPPED WITH DOORS MUST HAVE ALTERNATE FORM OF APPROVED PROTECTION - MUST WEAR FIRE JACKET