A summary of the mechanical specifications for a racing HQ Holden is listed following.
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| Wheels: | 14" x 7", or 14" x 8", steel rims or magnesium alloy rims
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| Tyres: | One make and size - Bridgestone RE 92's
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| Suspension: | A controlled package consisting of:
- all mounting points remaining in original position
-all bushings must be original (rubber)
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| Brakes: | Front disc (PBR or Girlock) type
Rear drum type
Friction lining free choice
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| Engine: | 202ci "Red" motor - maximum .060" oversize
Wade 933 controlled camshaft
Standard crankshaft
Conrods must be standard type
Engine may be blueprinted and balanced
Sump may be baffled
Cast pistons only - compression ratio is free choice
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| Cylinder head: | Valve springs are free choice but only one spring per valve (no double valve springs)
Valves are free choice subject to maximum head sizes - exhaust 1.375" and inlet 1.675"
Hand or machine finishing of head ports is not permitted
Valve lifters are free choice but must be of hydraulic operation and with a maximum diameter of 0.8428"
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| Exhaust: | Exhaust is free choice from the cylinder head exit
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| Carburettor: | Standard six cylinder 202ci "Red" motor Stromberg carburettor (one only)
Jets are free choice
Air cleaner element may be removed
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| Cooling: | Radiator is free choice but must bolt on using the original holes
Electric fan may be fitted
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| Clutch: | Method of actuation is free choice
One tonner clutch assembly may be fitted
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| Gearbox: | Standard 3 speed gearbox
Floor shift may be fitted
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| Differential: | Standard non-limited slip Banjo, or Salisbury, type - ratio 3.55 to 1
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