1. 360 Mopar production cast iron blocks permitted, also permitted is the Mopar performance cast iron “A” engine block or R3 block part #P4876792AB (59 degree valve tappet) or P4876672AB (48 degree valve tappet) is a good starting point World Products, or Dart Blocks allowed must remain the same configuration of stock Mopar blocks.
2. Block may ONLY have a Maximum cylinder bore of 4.030″.
3. Wet sump oil system ONLY. No dry sumps.
1. Any Forged steel or cast cranks ONLY. No Billets. Mopar performance crankshafts part #P5007253A is a good start. Must have stock stroke 3.58″, 50 lb. minimum weight. Minimum rod pin diameter 2.100″. NO knife edging, or winging of crankshaft. Balancing permitted.
1. Any forged steel rod, 6″ maximum length, 7/16 rod bolts permitted. Connecting rods not to exceed $750 cost.
“I” Beam Rods Allowed:
A. Crower 6″
B. Eagle 6″
C. K-1 6″
D. Manley 6″
E. Pro-Comp 6″
F. Scat 6″
“H” Beam Rods Allowed:
A. Eagle 6″
B. Callies-Compstar 6″
C. K-1 6″
D. Manley 6″
E. Pro-Comp 6″
2. NO Billet rods, or Carilla rods.
3. May polish beams, No profiling of CNC machining in center of beams.
4. Manufacturer’s name and Rod size must remain on rod.
1. Any flat top piston permitted.
1. Any harmonic balancer permitted.
1. Mopar W2 cast iron cylinder head permitted part number P5249769 (59 degree block) 180cc max intake runner volume, & 78cc max exhaust runner volume. P5007445 (48 degree block) 190cc max intake runner volume, 78cc max exhaust runner volume, or P5007445AB 196cc max intake runner volume, 78cc max exhaust runner volume, and casting numbers must remain on head unaltered. 64cc minimum combustion chamber volume. NO TOLERANCE. May use Brodix “SPEC” aluminum heads.
2. 2.02″ maximum intake valve diameter, and 1.60″ maximum exhaust valve diameter. No titanium valves, steel or stainless steel valves ONLY. 11/32″ minimum valve stem diameter. Multi angle valve job permitted. Hollow stem valves permitted any cylinder head.
3. No porting, polishing, gasket matching, or epoxying of runners. No short side radiousing. No bowl work more than .500″. Must be able to see and feel the defined raised lip of original bowl in the cylinder head, in all areas of the bowl, AND All bowl work must Remain concentric with the valve guide, and Any completely smooth blends, of the bowl on the short side (even though you can see where the cutter stops) will be considered short siding, again must be able to see and feel the defined raised lip of the original bowl. Milling of heads of accepted, (note combustion chamber limit above.)
4. May use any diameter valve spring. Any Valve retainer, 11/32″ minimum valve stem diameter. Any Steel push rod. Steel Valve keepers ONLY. Mopar may run shaft mounted rocker system. 5/16 valve stems permitted.
1. Any cast iron or aluminum intake.
2. No porting, polishing, squaring/gasket matching of ports. When using SPEC aluminum heads, you may gasket match intake port opening no more than ½” (.500″) deep into runner. NO MATCHING ON HEAD SIDE.
3. May run 1″ spacer (1 INCH-ONE PIECE WITH .040 TOLERANCE MAXIMUM) AND TWO STANDARD PAPER GASKETS (MAXIMUM 0.070 INCH THICK), ONE GASKET BETWEEN INTAKE TO SPACER AND ONE GASKET BETWEEN SPACER TO CARBURETOR.
4. Turtle OK not altered.
5. Total adapter not to exceed 1″ total. Anything mounted between carburetor and intake is considered spacer, and cannot exceed 1″ total.
6. Directional spacers OK.
7. All intakes must be from a recognized name brand intake manufacturer, ex Edelbrock, Brodix, Holley, Weiand, etc. MUST have manufacturer's name and part number intact and unaltered. NO import manifolds allowed.
1. Any flat tappet cam.
2. Stock diameter lifters ONLY .904″, OEM size to make of engine, NO ceramic foot lifters allowed, all lifters must have a magnetic base.
3. NO roller cams or lifters.
4. Cast iron stick ONLY, NO billet cams.
1. Timing chain and gears ONLY.
2. NO gear drives, or belt drives.
Fuel Pump and Fuel Cell
1. Belt driven okay.
2. No electric fuel pumps.
3. Steel case on fuel cell recommended.
1. Stock mount ONLY.
2. Electric fans OK.
1. Any battery operated.
2. No crank trigger ignition, & no magnetos.
3. NO electronic traction control device!
4. MSD boxes may not be mounted in driver’s cockpit.
1. Must be close to stock location, mounted in front the motor.
A. Drive train must have the transmission mounted on the rear of the engine. No direct drive or in / out boxes will be allowed.
B. Any transmission with working forward and reverse gears is permitted. Only one (1) drive shaft allowed.
C. Manual transmissions must be equipped with an operational clutch.
D. Automatic transmissions are permitted.
E. All drive shafts must be painted white or sliver and must be protected by a minimum of two (2) safety hoops or slings. Reinforcement and shielding of the driver’s compartment is strongly recommended. Drive shafts may be made of any material however carbon fiber or aluminum shafts are strongly recommended.
A. Any type of rear end differential is permitted.
B. No open tube or sprint car type rear end will be permitted.
C. No live axle rear ends permitted.
D. No independent rear suspensions are permitted.
E. All rear ends using a cable to lick in the rear end must have the cable mounted outside the cockpit area and not in reach of the driver.
A. All drive shafts must be a minimum of two inches (2”) in diameter. All drive shafts must be painted silver or white.
B. Only one drive shaft is permitted.
C. The drive shaft must be protected with a secure drive shaft hoop or sling.
Shocks and Springs:
A. Shocks must be constructed of aluminum or steel. Canister shocks are permitted.
1. The only external connection allowed to the shock is a single hose to a single
Remote canister with the option of a compression adjuster in the canister.
2. Compression adjuster and/or canister cannot be mounted within the reach of the driver.
B. No cross connected shocks are allowed.
1. The only external connection allowed to the damper is a single hose to a single remote canister with the option of a compression adjuster in the canister.
2. Compression adjuster and/or canister cannot be mounted within the reach of the driver.
C. No “RodThrough” designs are allowed.
1. “RodThrough” shocks are defined as those shock absorbers in which the piston rod protrudes from both ends of the shock body.
D. No inerters are allowed.
1. No rotating parts inside the damper.
2. No Inerter style dampers, either mechanical or hydraulic, or other type of primarily acceleration sensitive damping devices not permitted.
E. No electrical adjusted or active dampers are allowed. No electrical wires, transmitting or receiving components will be allowed to be attached internally or externally to the dampers or mounted inside any component or dampers. No portion of the racecar including and not limited to shocks and spring components or chassis components may have the ability to communicate transfer/transmit/receive any type of digital or analog data or any language and or adjust or monitor in anyway whatsoever including but not limited to a variation of a wireless remote device / phone / computer / tablet / iPad or a mechanical remote device.
F. Any new chassis design or component designs pertaining to and/or but not limited to
Shock absorber mounts must be submitted to East Bay Raceway Park for approval before they will be permitted for use in competition. Manufacturer and / or competitor may be required to disassemble for complete inspection before instatement of new part is permitted.
G. Springs must be made of steel. Torsion bars are not allowed in rear. One coil spring per wheel.
H. Coil springs must be steel. Leaf springs may be composite or steel. NO progressive or stacked springs.
I. Shock Locations
1. Only one shock per wheel is permitted at the left front, right front, and right rear corners.
2. Left rear must have one shock behind the axle tube and may have one traction (dummy) shock on the front side or top of axle tube. Must mount vertically.
3. One 5th coil shock permitted.
4. One 90/10 optional shock may be mounted above lift arm on upper lift arm plates. Shock must mount within 3” of the centerline of the rear ends center section.
J. Drop chain (limiting chain) is permitted. Must mount vertically between frame and a clamp bracket.
K. Bump springs are NOT permitted.
L. Suspension covers are not allowed. Rear covers on race car are not allowed outside of your pit area. Spring and/or shock covers are permitted, but must be fastened directly to the spring
M. A swing arm and / or Z-Link suspension is permitted as long as the top and bottom solid links are mounted on hiems and run in the opposite directions of the bird cage. The shock on a swing arm or Z-Link rear suspension may mount to the bird cage or the bottom radius rod.
A. Any new chassis design or component design and or technology pertaining to and/or containing suspension must be submitted to Unified Late Model Series for approval before they will be permitted for use in competition. Manufacturer and / or competitor may be required to disassemble for complete inspection before instatement of new part is permitted.
B. Suspension and/or rear end parts can be made of steel or aluminum. Aluminum mounting brackets are permitted.
C. Frame and/or suspension mounts must be welded or bolted solid to the frame and not move. I.E. Floating, sliding, pivoting and/or rotating mounts and/or brackets of any sort are not allowed.
D. Bolted components must match the correct bolt size with the hole (for instance no 3/8 inch bolts in a ½ inch hole will be deemed illegal) and be torqued to a min of 40 foot-pounds per inch.
E. Rear Suspension Mounts
1. Single sheer mounts must be 1/4” minimum steel and/or 1/2” minimum aluminum.
2. Double sheer mounts must be 1/8” minimum steel and/or 1/4” minimum aluminum.
3. Sheer mounts must use minimum 5/8” rod ends with minimum 1/2” grade 8 bolts only.
4. Double sheer mount must be no wider than 4 inches with a minimum 1/2” inch grade 8 bolt with steel or aluminum spacers only.
F. Only one (1) mechanical traction device is permitted. Only one (1) pull bar or one (1) lift arm is permitted. One brake bar is permitted, but MUST be chain mounted and operate in a downward motion only. Brake bar cannot be solid or work in an upward direction. No other options are allowed. Covers of any sort in any relation to the lift arm or pull bar are not allowed.
G. Lift Arm and Pull Bar
1. Floating, pivoting and / or rotating mounts and / or brackets of any sort (connected to and/or associated with the pull bar or lift arm) are not allowed.
2. Lift arm is defined as a steel or aluminum triangulated bar that is connected at the top and bottom of the rear end housing, extending forward where it is connected to a shock, Shock spring coilover combination and a limiting chain. One stabilizer bar is permitted to locate the front of the lift arm from left to right in the car.
3. 6th coil or braking spring assemblies are permitted, must be in front of 5th coil shock.
4. Pull bar is defined as a continuous assembly that is connected to the top of the rear end and extends forward to a solid mounting point located on the chassis. The mounting location at both the front and rear of the pull bar may be adjustable but must remain constant during competition (cannot be adjustable from the cockpit.)
H. Radius Rods
1. All rear suspension radius rods must be of a fixed length. No hydraulic cylinders, torsion bars, bump rods, spring rods, slider rods, or shock type radius rods are permitted.
2. Radius rods must be a minimum of 1” diameter OD. Rods can be round, square, or hex shaped. Rods must be a minimum of .095 steel or .120 aluminum in tubing thickness.
3. Heim joints must be a minimum 5/8, and a maximum 3/4” steel heim. No rubber bushings.
4. ONLY Two (2) radius rods per side.
a. Radius rods must be spaced on the frame a minimum of 6”.
b. Radius rods must be spaced on the birdcage a minimum of 6” and a maximum of 12”.
c. Measurements will be made from center of each radius rod bolt.
1. Birdcages may consist of multiple barrels but must bolt or weld together to work as single barrel birdcage.
2. Limited one birdcage (1) per side.
3. Shock(s) and radius rods must mount to the birdcage.
4. Floating, pivoting and/or rotating mounts and/or brackets of any sort are not allowed. All brackets or mounts attached to the birdcage must be bolted or welded solid.
Remote Control Suspension Devices
A. NO “in cockpit driver controlled” suspension devices permitted. NO weight jacks of any kind permitted. (This includes fifth [5th] coils, etc.). ANY driver using “in cockpit driver controlled” suspension devices or weight jacks WILL BE DISQUALIFIED FROM COMPETITION!
A. Mufflers are MANDATORY. Schoenfeld #112535 or 112530 are mandatory mufflers. All mufflers must remain on car at all times and be in working condition. Any loss of muffler will result in automatic disqualification.
B. Exhaust is not permitted to be directed towards ground. Exhaust must be parallel to the ground.
Fuel Cell / Fuel:
A. A commercially manufactured approved fuel cell that meets FT3 specifications is required. The cell should contain a maximum of thirty-two (32) gallons and must be securely mounted in the rear of the car. The fuel cell should be inside a 20 gage (.040”) metal can and is supported by a minimum of two (2) steel straps. The straps must be a minimum of two inches (2”) by 1/8” (.125”).
B. All fuel cell must be completely visible from the rear of the car. Fuel cell may not be mounted lower than the bottom of the quick change rear end.
C. The fuel pick up must be on the top or right side of the fuel cell, be constructed of steel and must have a check valve in case of roll over.
D. The FT3 fuel cell must be securely mounted behind the rear axle between the rear tires, a minimum of four inches (4”) ahead of the rear bumper, no lower than the quick change housing. It must be mounted with a minimum of two one eighth of an inch (.125”) thick steel straps two inches wide around the entire cell. Cells mounted in a square tubing frame are permitted. All cells must be securely mounted to the frame. The bolts used to mount the fuel cell must be a minimum of seven sixteenths of an inch (7/16”).
E. No fuel injection systems, electric fuel pumps or pressurized fuel systems allowed.
F. One (1) four (4) barrel carburetor only, any manufacture.
G. Alcohol or racing fuel permitted. Nitrous Oxide is NOT ALLOWED. Fuel may be checked at any time.