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The rules and/or regulations set forth herein are designed to provide for the orderly conduct of racing events and to establish minimum acceptable requirements for such events. These rules shall govern the condition of all events, and by participating in these events, all participants are deemed to have complied with these rules. NO EXPRESSED OR IMPLIED WARRANTY OF SAFETY SHALL RESULT FROM PUBLICATIONS OF OR COMPLIANCE WITH THESE RULES AND/OR REGULATIONS. They are intended as a guide for the conduct of the sport and are in no way a guarantee against injury or death to a participant, spectator or official.

The race director shall be empowered to permit reasonable and appropriate deviation from any of the specifications herein or impose any further restrictions that in his/her opinion does not alter the minimum acceptable requirements. NO EXPRESSED OR IMPLIED WARRANTY OF SAFETY SHALL RESULT FROM SUCH ALTERATION OF SPECIFICATIONS.  Any interpretation or deviation of these rules is left to the discretion of the officials. Their decision is final.





  • Body must maintain standard windshield openings and standard body size, no narrowing of bodies of any kind. No spoilers, air dams or aerodynamic enhancing devices of any kind allowed any place on car or chassis. These cars are intended to represent the era when they were originally racing.

  • Bodies must be made of fiberglass and in the style of 1932, 1934, of the 1940 era cars. Must have solid firewall and floorboard.

  • No covering of side or rear windows is allowed. The passenger side window must be cut out to allow driver exit. A roof hatch is allowed. Rear window openings no larger than: SEDAN 9 ½ inches tall 44-inch width, COUPE 7 ½ inches tall 47-inch width.

  • No part shall protrude through the hood other than hood retaining hardware.

  • No mirrors allowed.

  • Side nerf bars can be of owner’s design as long as they protect from tire climbing as much as possible. The front and rear of the nerf bars must be curved in toward body closer than outer edge of tire. No open-end bars exposed to other cars are allowed. The nerf bars can come through the body and connect to the roll cage and or the frame. They cannot be built of any stock over 1 ¾” outside diameter.

  •  A firewall and floorboard must cover as much of interior area as is reasonably possible. The firewall and floorboard may be constructed of aluminum or metal.

  • Bumper Mounts (2 per side). If front or rear bumper becomes unattached, car will be parked for that event. Rear bumper not to exceed 76 inches.



  • The frame must be from the 1978-1988 mid-size metric GM. 106″ wheelbase minimum. The frame must maintain its stock dimensions no holes or cutting to lighten. Roll cage set back: 22 inches from center of rear end housing to closest point of roll cage, with a 1-inch tolerance. A minimum of 1 ½ inch by .095-inch O.D. Round steel tubing must be used for roll cage. All 4 points of hoop bar must be welded directly to frame.

  • The frame is required to have an x-brace built into the bottom of it. It must be attached to the original frame no brackets off of frame.

  • Only steel shocks. $75 buy rule each. No shock covers.

  • A fully adjustable dual master cylinder brake pedal and master cylinder assembly is allowed. Any aftermarket steel caliper is allowed.

  • Springs, minimum of 5 inches outside of diameter. There is no minimum or maximum length requirement. Front and rear springs must mount in original locations. No coil-over shock and spring combinations allowed. The spring mounts on the top of the rear end housing can be made or modified so springs set on them properly.

  • Weight jack bolts are allowed on all 4 corners as are spring buckets. The side of the frame beside the front springs can be cut out to owner’s choice.

  • Any size diameter front sway bar is allowed from any stock production vehicle. Any mounting and adjustment design can be used. GM, Ford, Chrysler or other allowed. Any rear sway bar allowed.

  • Any power steering gear allowed that will bolt on original GM location.

  • Any power steering pump and pulley assembly allowed. Any manual steering box allowed. Steering quickeners are allowed. No rack and pinion units allowed!

  • Tie rods, drag links, idler arm and steering arm must all be OEM parts for this chassis. Steering box and idler arm can be shimmed at the frame mount for best alignment or clearance problems as from wreck damage or front frame rail alignment.

  • Aftermarket OEM style steel rotors are allowed on front spindles and any size lug studs are allowed. OEM rotors can be reinforced for safety.

  • Only metric 1978 to 1988 chassis spindles are allowed. And “speedway three-piece” spindles permitted. No big metric spindles allowed.

  • Both front lower A-frames and all 4 rear control arms must be stock and original length. Stock rear uppers may be modified.

  • All frame and control arm mount points must be in original location.

  • Any upper A-frames can be of owner’s choice. Any location is allowed for vertical placement of inner mounting point of upper A-frame or center line of A-frame pivot shaft. No minimum clearance from frame to pivot shaft centerline is required. Upper A-frame mount holes can be slotted vertically or horizontally if wanted.

  • The front chassis cross member can be trimmed off below drag link assembly for ease of repairs or clearance.



  • A catch can is required to be connected to all radiators.

  • Radiator must mount in front of engine.

  • OEM type belt drive water pump.


  • Steel driveshaft only.

  • A driveshaft loop is required just rear of the front u joint.

  • · The driveshaft must be painted white.


  • All cars are required to have a master shutoff switch mounted in clear view and reach of the driver’s window for easy emergency crew access.

  • No traction control.

  • No radios are allowed.

  • OEM type distributor is required. Any HEI Large Cap Distributor.



  • No 265, 283, 302, 327, 350 or 400 engines allowed.

  • Any steel I-beam rod, 5.7 length only. Any rod bolt, rods must be style and profile of stock GM production rod. 2.100″ rod size can be used, rod beams cannot be polished. Outside of rod must have all casting marks.

  • Only 305 cubic Chevrolet engines allowed. They must be original 1 or 2 piece rear main seal design. Cast iron blocks only. No 4-bolt main blocks allowed. A maximum of 0.060 overbore plus tolerance equaling 3.806″ allowed or 316 cubic inches. No additional tolerance allowed.

  • Legal heads consist of the cast iron emissions GM factory head. Replace it with this: Any 305 head with 184 max valves 53cc up to 1996 model. No Vortex heads. They must be totally of the same design as original on the early 305 engines such as valve angles, valve cover mounting and total bolt pattern for head bolts and intake bolts. Any head that shows definite performance gains will be omitted from competition. No vortec head or intake combination allowed.

  • No porting or polishing allowed. Valve face and seat angle combinations are to owner’s option. Valve guides and seat replacement is ok but do nothing to improve placement or locating angles. Heads are meant to only have a good basic head job done and nothing to build significant horsepower gains in flow or other characteristics. Resurfacing is allowed. The boss shoulder where the short head bolts go through cannot be shorter than 7/8″ or 0.875″. Head gaskets must be no less than 0.038″ minimum thickness after compressed.

  • Balancing of all rotating parts allowed. No excessive metal removal. Any crank minimum weight of 50 pounds with cam gear. It can have your normal engine rebuilding work, but no major weight saving or knife edging of throws allowed. Journal radius work is OK. The stock 3.48″ stroke must be maintained. No 2.00″ rod journals. The oil flow holes may be chamfered.

  • Valves must be of original 1.50″ and 1.84″ diameters or smaller. Aftermarket stainless steel valves or such equivalent are allowed. Brush or swirl finish valves are allowed but no mirror finish valves. OEM stem size is required. Valve springs cannot be more than 1.275″ diameter. Springs can only be of original style consisting of 1 outer spring and 1 inner flat style damper spring. Springs must have no more than 120 pounds closed seat pressure.

  • Any type of steel springs retainer and keeper assembly allowed. Any screw-in or press-in rocker studs allowed. These include 3/8″ or 7/16″ rocker studs. Guide plates are allowed, as are hardened push rods of any length. Stud girdles are optional. Stamped steel long-slot rocker arms, roller tip rockers, or roller rockers are allowed. Rocker ration is optional.

  • The cam must be a flat tappet hydraulic design with original size diameter lifters. No mushroom or roller lifters allowed. Hydraulic lifter only. The cam lift cannot exceed .420″ at the valve. This is checked with a solid lifter in place of the hydraulic lifter. A 0.005″ tolerance will be allowed or maximum due to production tolerances allowed by cam manufacturers. Nothing more than that will pass as legal. This is the maximum left allowed regardless of ration rocker you have chosen to use.

  • Pistons can be cast or forged. They must have 4 eyebrow marks defined in the piston dome flat top design. Defined dish pistons allowed with only 2 eyebrows but no solid dome pistons allowed. Wrist pins can be floating or pressed, and bushings allowed. No gas porting of pistons from the top allowed.

  • Block decking is allowed. This is checked with a straight edge held in line with wrist pin and engine cranked over with starter. Piston must not hit straight edge above block while cranking. All normal engines rebuilding machine work allowed on block. Oil drain holes can be screened. Oil paths can be polished to assist in return flow. Do not get exotic with your work as you could push over the limit. Minor work is allowed.

  • Any standard production stamped GM small block Chevy intake for trucks and cars allowed. Commonly used casting numbers are 14057055, 14014432 and 10185063. They can be of 2- or 4-barrel design and cast iron or aluminum. They must be of the late model emissions type with EGR valve mount on the intake. It must be plugged off and not functional. No vortec, off-road or marine intakes allowed. No porting or polishing allowed. A carburetor spacer or adapter with a 1-inch maximum thickness allowed.

  • Any timing gear and chain allowed. No gear drives allowed. A cam walk button and cam thrust bearing allowed.

  • Any harmonic balancer may be used. There is a $150 buy rule for balancer.


  • Engine location is to be setting as close as possible to the center of the race car chassis between the front frame rails.

  • Setback-Second plug back to be no further back than center of upper ball joint. 1 inch tolerance.



  • Any header may be used. There will be a $450 buy rule for headers.



  • Gas Only, NO E85 or Oxygenated.

  • Box stock Holley 2 barrel 4412 only. No other 2 barrel or 4-barrel carburetor allowed. $300 buy rule on carburetor.

  • Any fuel pump allowed that mount on original engine fuel pump location. No belt drive or electric fuel pumps allowed.

  • Any air cleaner is allowed as long as it does not force outside air into the air cleaner as in a ram air effect. Any flow directional device used inside the air cleaner is permitted.

  • A fuel cell is required of no more than 8-gallon capacity. It must be mounted above and between the rear springs. Rear side of fuel cell cannot be further than 3-inch rear of rear most point of rear end assembly cover. A maximum of 2270 cubic inch outside displacement allowed.



  • Engine must retain a wet sump system. Flow routing can be of owner’s choice. Remote oil tanks are not allowed.

  • No dry sump allowed.



  • The rear axle assembly for 78 thru 88 midsize GM metric cars such as Monte Carlo, Cutlass, Regal or Grand Prix. Either 7.5″ or 7.625″.

  • No 9-inch Ford or quick-change rear ends.

  • Gear ration – ANY

  • Any steel axle may be used for safety.

  • The carrier for the ring gear can be of owner’s choice no full spools, a locker positrak and spider eliminator or welded spiders or mini locker. GM CARRIER ONLY.

  • Standard drum brake set-up or standard OEM disc brakes on rear axle assembly with steel caliper such as Camaro or Firebird. NO AFTER MARKET ALLOWED.



  • Only the GM TURBO 350 automatic transmission is allowed. No turbo 400, Power Glide or MANUAL transmissions allowed. All length 350 turbo transmissions allowed. Cases with Chevy and B.O.P. bolt patterns allowed. Transmissions buy rule $450 with convertor.

  • A stock torque convertor is required. A 12 inch outside diameter is required.

  • No valve pedals.



  • Maximum tread width on front and rear is 76 inches.

  • Width is determined at the axle of the spindle centerline and at the widest point on the tire sidewall.



  • Minimum car weight is 2500 pounds with driver after race.



  • Only 8 inch wide and 15-inch diameter steel wheels allowed.

  • Only 2-inch, 3 inch and 4-inch offset wheels are allowed on either side.

  • Only 8 inch wide by 15-inch tires.

  • 26.5 Or 27.5 American Racer Medium Compound, Hoosier, American Racer Hard Compound Tire.

  • Tires must punch no less than 42 at any time. No siping or grooving, but grinding is ok.

  • Tire protest

    • Any car can protest a tire and have it sent to Blue Ridge for testing for $100. Blue Ridge’s decision will be final. All protests must be at the scales and be made immediately after qualifying and after the feature. Refusal is an automatic disqualification.



  • No drilling, grinding, acid dipping, coating, cutting or any other means allowed for purposes of weight reduction, aerodynamics, air flow or any other purpose allowed on engine, body, frame, or any other part of car.


  • HEADS – Any 305 with 184 max valve 53cc up to 1996 model NO vortec.

  • FUEL – NO E-85 or oxygenated

  • BUY RULES – Shocks $150 each (no bump stops)

    • Headers $450

    • Transmission and Converter $700

    • Balancer $150

    • Carburetor $600

  • Any buy rule claim can only be done after feature race.

  • Protest Rules:

    • $800 Complete Tear Down (Carburetor to Oil Pan).

    • $500 To remove 1 Head, Check Head, Valves, Bore and Stroke.

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