Make sure you read all safety and procedural rules,  THEY DO APPLY TO YOU
These rules are posted here as conveyance only, Not responsible for any type Os or other copying mistakes. Call the track office at 607-745-0275 if you have any questions.

Open to any American Made Car – 1960 or newer.
In the event your car does not fit the rules, but you wish to compete, please contact Skyline Raceway Park Tech officials for a ruling ahead of time so we may make a determination on your car before you arrive. Engine style and Transmission style should be displayed on the hood

NO mirrors, two way radio or phone devises allowed.


1960 or newer American manufacturer brand rear wheel drive passenger car. NO SUVs, or jeeps. NO strut cars allowed. Minimum wheelbase 107” with 1” tolerance. Roll Cage must be constructed using 1 1/2 .095 tubing Min. It is highly recommended that the driver side door bars be plated with sheet steel. (16 ga.) Front frame stubs forward of the steering box and idler arm may be replaced with tubing. Unibody cars can have the frame replaced with 2x3 tubing from 36” behind centerline of front wheels. 2x3 tubing must go over the rear end housing. Front frame on all cars can be replaced forward of the steering box and idler arm with tubing. Front clip must remain stock – Center main cross member can not be altered except notching for fuel pump clearance.
*The Johnson Chassis or equivalent is allowed as a replacement for the GM METRIC FRAME as long as all measurements match the GM METRIC FRAME.
* Any Camaro or Firebird stub car running a 4 link MUST follow the GM METRIC FRAME measurments for placement of rearend and lower control arms mounts. Must use GM METRIC or equivalent stock length lower control arms and follow all GM METRIC chassis rules. Everything must match side to side. No BRP type latemodel Street Stocks allowed. *See weight rule.

All suspension and steering mounts must be in stock OEM mounting location unless noted otherwise. Front lower control mounts must be in OEM location. Lower “A” arm pivot holes are to remain stock as per OEM spec. NO relocating or Slotting allowed. Must use steel slug on Johnson Chassi and must be the same side to side. Upper A frames may be replaced with a steel shaft tubular A frame. Aftermarket upper A frame mounts allowed in OEM location with a max. 1 inch tolerance. Control arm length of 9 inches MAX. Tie rod ends may be replaced with heim joints. Steering column may be replaced for safety. Steel body shocks front and rear. Stock or alternate locations allowed. One shock per wheel (NO ADJUSTABLE SHOCKS ALLOWED) weight “jack bolts”, adjustable spring spacers allowed. No pull bars, torque arms, pan hard bars or leaf/coil over type suspensions. No three link rear suspensions.
All Lower suspension bushings (Front & Rear can be replaced with solid type rubber or steel bushings. (NO MONO BALL TYPE) on front or rear lower control arms.

Factory steel bodies may be gutted. Roof and hood should be factory items or equivalent,    
subject to tech approval. Steel or aluminum roofs must be a min thickness of .040.
Fiber glass roof and hood allowed subject to tech approval.
Spoiler allowed, max height of 5”. Width no wider than the body. 82 inch MAX.
Side body panels may be replaced with sheet metal or aluminum min .040.
Aftermarket front bumper covers mandatory rear bumper covers optional.
NO late model style down force noses allowed. (NO fiberglass).
Front and rear bumpers are NOT allowed to have any sharp edges that may cut a tire.
Rear bumper must run the entire width of body and be min of 12” in height from ground.
All exterior side rub rails, front and rear bumpers WILL have rounded edges and exposed bolts must be carriage bolts. Mandatory loop bar or heavy chain front and rear for wrecker use is mandatory and will be strictly enforced,  No overbuilt bumpers "Cowcatcher's" will be allowed.
Front and rear bumpers may be replaced with round tubing. Cars must look clean and presentable, body damage on cars should be repaired promptly. Max body width will be 82”

One aluminum or copper/brass radiator must be located in front of engine.
Cast iron or aluminum water pump allowed. NO electric fans allowed.

ENGINE: V8-ONLY GM, FORD, CHRYSLER-Motor limits as follows:

602 Crate motor acceptable: must follow D.I.R.T. Crate motor rules with exception of Rev box or chips. All engines must remain stock stroke for Mfg. Maximum cubic inch. GM 350+ .070 overbore,  Ford 351+ .070 over bor, Chrysler 360 & G.M. 400 + .040 overbore.  No stroker engine of any type. All G.M. 400's must run 1 + 11/16" Restrictor plate Stock item straight 4-hole, no additional machine work.  Stock production blocks only. 1” pipe plug must welded in oil pan for viewing of rods and crank. Wet sump only.

Stock cast iron / bowtie heads –  intake valve 2.02” – 1.5 exhaust maximum (exception:                 Ford/Chrysler maximum 1.6”. Allowable heads must have casting number. Vortec heads will have a max 1.94 -1.5 valves. The Vortec heads allowed are: No. 10239906, 12552520 & 12558062 . (No aftermarket or high performance Vortec heads). Non-Performance World Product Stock Replacement Chevy Heads allowed. Part numbers World 043600 or World 043610. Pined or screw in studs on heads are legal. Push rods, rocker arms & valve springs must be stock type. Any roller rocker allowed. Ball tip pushrods allowed. Any type lock nuts on rocker arms allowed. No shaft rockers. Stud Girdle allowed. Push rod guide plates allowed. NO FORD GT HEADS ALLOWED.
NO hand grinding, sanding, blending, or de-burring where a cutter or stone or stone leaves off.

Method Of Checking Heads Will Be As Follows:
On the exhaust side the header will be removed and the inspector will place a tool in the port which will consist of a .531” diameter ball bearing welded to a shaft. With the valve fully open, the ball will be placed against the valve stem and moved to the full circle around the valve stem. If the ball drops down through the valve seat in any position around the full circle of the valve stem, It will be deemed illegal.  On the intake side the intake will be removed and the same procedure will be done using a ball size of .787”. NOTE : these methods of checking the head will hold true with a cold or hot engine.
Part numbers on Cyl. heads must be visable and unaltered. NO race flow, cut down or non OEM valves allowed. Steel or aluminum roller rockers allowed.  Max ratio 1.6.
NO shaft rocker arm setups allowed, Except stock Chrysler OEM
Any flat tappet cam or hydraulic cam with functional NON-roller lifters allowed. Flat top pistons only. NO piston may extend beyond the surface of block deck.
Stock unaltered crankshafts or aftermarket equivalent only. Crank Must weigh 48lb.s Min. Connecting rods must be stock steel I-beam up to 6.0” max.  NO lightning before balancing on rotating assembly. Balancing and weight matching allowed. Engine setback is limited to the #1 spark plug even with the upper ball joint.

Factory stock distributors, points, HEI only. (NO 16VOLT SYSTEMS) *Aftermarket replacement parts allowed. NO printed boards or traction control devices of any type allowed. *602 Crate engines must use stock Crate engine distributors.

Holley 4412 or 4412-BKX. Must pass tech by track tools. Allowable 602 Crate carb: Same as allowed By DIRTcar. NO sideways mounted carburetors. Please take note that GO NO GO gauges will be used.

Cast iron 2 barrel passenger type intake manifold, No marine or military type manifolds allowed. Aluminum intake allowed as follows: -Chevy: Weiand part #7547, 7547-1 & Edelbrock #5001,  #2101 or #2116 -Ford: weiand part # 7515, 7516 & edelbrock #5021, 5081, 2760 -Chrysler Weiand part # 7545 & Edelbrock #5076 -Chrysler w-2 heads Weiand # 2920

The Carb adaptors that will be allowed: Part # BRP-377 & HV-301-1 or equivalent. With max thickness of 1 1/8” including gasket. NO bevel radius or tapering to said item. Straight bore only.
No electric fuel pumps. Pump gas or standard race fuel only---NO performance enhancing additives or alcohol. ANY MODIFICATION TO ABOVE ITEMS WILL NOT BE LEGAL

Factory OEM automatic or standard transmissions. Stock Size functional torque converter must measure min. 10.5-in. O.D. Factory stock steel flywheel and factory stock steel pressure plate housing, one clutch disc only. NO AFTER MARKET PRESSURE PLATE OR CLUTCH DISC.
Manual transmissions must have a full steel bell housing.
All cars running Automatic transmissions are recommended to run a scatter shield safety blanket. Steel drive shaft only painted white with car number. Drive shaft must have two hoops one no more than 6” from the front u-joint and one in the middle of drive shaft.
IF RUNNING - Falcon/Bert/Brinn Transmission:  (See weight rule)
Falcon/Bert/Brinn Transmission: Falcon #60100 ONLY, Bert #BERLMZ ONLY, BRINN 70001 ONLY or Automatics with Direct Drive Set ups may be used with an Open or Crate motor - No Ball spline type Transmissions .( See weight rule)

Rear end may be replaced using the Ford 9”  "Steel" mini spool or full spool only.  Floaters allowed. Coil cars must use lower trailing arms that meet OEM specs, length, location and have rubber or steel bushings (NO MONO BALL). Rear upper control arms may be fabricated and adjustable with heim joints. Length to match from side to side. Coil springs must be located in stock location centered on the top of the rear end housing. ” Rear lower control arm bracket center hole may not exceed  3 3/4” from bottom of axle tube. Leaf springs allowed, Must be magnetic – adjustable sliders allowed. Measurements from the center of rear end tube to front mounting point of spring must match.
NO pull bars, torque arms, pan hard bars or leaf/coil over type suspensions. NO three link rear suspensions. NO traction control devices. NO quick change, Lockers, Gleason, or Gold Track rear ends.

Steel wheels only - Max wheel width of 8” max. Any backspace, Bead locks allowed on Right side.
Tires will be as follows: American Racer 245-70-15,  American Racer 26.5/8.0 15DT, 27.5/8.0

No tire wider then 8” as marked on sidewall - Grooving, grinding and siping are allowed.
Must use at least ½ “ lugs with 1” racing lug nuts. Only Foam type wheel plugs allowed. NO duze type covers. NO chemical treating - NO wide five Rims or hubs.

Car must have four fully functional OEM style calipers and rotors “ STEEL ONLY”. Balance bars, external or remote adjusters allowed. NO electronic devices allowed.

Fuel cell must be securely fastened in the trunk area of the car.
Cell over flow/vent must have a role over valve either internal or external. A PVC valve is recommended externally. This will prevent tech from checking physically for check valves internally.

Cast iron unaltered exhaust manifolds or street type headers. Crossover headers allowed –NO headers or any part of the exhaust may be interconnected at any point.
Exhaust must exit behind the driver. 1 5/8  or 1 ¾ headers.  NO 180 degree or step headers allowed.

Minimum weight with driver after heat and feature:
SS=Street Stock                   DD=Direct Drive        
SS                      2900 lbs.   2 barrel
SS/DD               3100 lbs.   2 barrel
Crate SS           2900 lbs.   4 barrel
Crate SS/DD    3125 lbs.   4 barrel
400 G.M.          3200 lbs.  2 barrel
Camaro or Firebird with full stock stub with Leaf springs 3000lbs. - 2 barrel carb. Crate or Open motor.
Camaro or Firebird with full stock stub with tube 4 link - 3250 lbs. 2 barrel carb. Crate or Open motor.
TRACK SCALES WILL BE USED TO DETERMINE WEIGHT! If you are found to be under weight you may request the head tech __________________________ be present to confirm the findings of scale personnel. Those findings will be final.

Driver seat must be located in stock OEM position . Seat must be a minimum of 25” in front of the rear axle housing, measured to the rear bottom of the diver seat.
Gloves and neck brace are required. NO fiberglass seats. Five point racing safety harness is mandatory. Head and neck restraints are recommended. Holes through firewall should be kept to a minimum and sealed. Window nets are mandatory.

(one 12 volt battery only) battery must be mounted in such a manner that it will not break free from it’s mounting location. It is recommended that it be mounted in a marine type battery box.

Skyline Raceway Park Tech reserves the right to check and deem any car in competition illegal regardless of home track. Items not covered in these rules are at the discretion of Skyline Raceway Park Tech Officials. In the interest of fair competition Skyline Raceway Park reserves the right to address any over competitive race car.