All Trucks must be at specified minimum weights and percentage at all times

• A/B (Waterford origin 4 link) 
  •  Weight
    • 2900 lbs
    • Maximum Left Side Percentage 56.0
    • Minimum  Nose Weight              54.0
  • Wheelbase
    • 108 inches  
  • Ground Clearance
    • 4 inches  (All components including exhaust except Fuel Cell and Crankshaft )  
    • Fuel Cell                                         7 inches
    • Crankshaft Height                         12 inches
      (Crankshaft Must be centered between frame rails)
  • Engine Location-
    • Forward most spark plug base must be 2 inches forward of imaginary Line between center of Ball Joints. (Tolerance .25 – .5 inch max)                     
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• C   (Riverhead Origin) 
  • Weights
    • 2900 lbs      
    • Maximum Left Side Percentage 56.0
    • Minimum Nose Weight              54.0
  • Wheelbase
    • 112 inches 
  • Ground Clearance
    • 4 inches       
    • Fuel Cell                                         7 inches
    • Crankshaft Height                         12 inches
      (Crankshaft Must be centered between frame rails)
  • Engine Location-
    • Forward most spark plug base must be 2 inches forward of imaginary Line between center of Ball Joints. (Tolerance .25 – .5 inch max)
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• D   (Street Stock Conversion)
  • Weights
    • 78-87 G-Body Metric Frame  2950 lbs
    • Non-metric including Camaro 3025 lbs
    • Maximum Left Side Percentage 56.0
    • Minimum Nose Weight               54.0
  • Wheelbase
    • 108 inches    
  • Ground Clearance
    • 4 inches  (All components including exhaust except Fuel Cell and Crankshaft)
    • Fuel Cell                                         7 inches
    • Crankshaft Height                         12 inches
      (Crankshaft Must be centered between frame rails)
  • Engine Location-
    • Forward most spark plug base must be 2 inches forward of imaginary Line between center of Ball Joints. (Tolerance .25 – .5 inch max)
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• S – Metric – (New style Seekonk truck as raced at Seekonk)
  (Includes all weight adjustments including for chassis mounts, 3 point rear, wheel base,)
  • Weights
    • 3070 lbs
    • Maximum Left Side Percentage 56.0
    • Minimum  Nose Weight               55.0 
      (Adjusted 1% higher due to Engine height and set back)
  • Wheelbase
    • 102 inches 
  • Ground
    • 4 inches  (All components including exhaust except Fuel Cell and Crankshaft 
    • Fuel Cell                                          7 inches
    • Crankshaft Height                         11 inches
      Must be centered between frame rails
  • Engine Location
    • Forward most spark plug base even with a line between center of Ball Joints.               
      (Tolerance .25 – .5 inch max)   
      _______________________________________________________________________    
• Weight Tolerances:  None – No weight tolerances allowed other than listed in rules 
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• Chassis Weight Adjustments(Does not include Seekonk Metric)
  • Three link rear- Add 50 lbs.
  • Lower trailing arm must connect to chassis to stock mount in stock location
    • All Chassis except Seekonk Metric Add 25 lbs for altered front mount
    • Trailing arm
      • Max length 28.00 inches eye to eye.
      • All links including Upper link must be tubular with spherical rod ends or stock
        • No springs, rubbers or other design allowed.
        • Add 10 lbs for every 1.0 inches over
          Example 28.250 – 29.250 add 10 lbs
          29.251 – 20.250 add 20 lbs
    • Tread width – (See Section 12 for specification)
      • Over/Under specification for Chassis add 20 lbs per inch or 5 lbs per 1/4 inch
    • Engine Set back
      • Add .5% nose weight for every inch of Engine Set back past spec for Chassis
    • Rear Shelf  Metric (A/B S)
      • There is no penalty of removing or altering the rear shelf
        (Please note: removal of the shelf alters the rear clip strength.  A tie in replacement tubing that runs from side to side in place of the shelf is recommended.)
    • Wide Five Hubs
      • Add 50 lbs
      • If not using pin adapter on OEM Spindles add 25 lbs for Non-OEM Spindles
• Engine Weight Adjustments
  • Aluminum Heads ( Claimer or 603)
    • Add 20 lbs per frame rail as specified in the engine section (5)
    • Carburetor 2bbl 4412
      • deduct 25 lbs if original motor eligible for 4bbl 
        (Does not include Claimer or Open options)