Permitted modifications supported by documented evidence.


875cc or 998cc.

Cooling System.

Front mounted radiator. NOTE. Any fluid carrying lines or tubes routed through the driver/passenger compartment must be painted RED.


Twin 1.25, 1.5, Stromberg or S U (Not later H I F type). Twin DCOE Weber´s


Four syncromesh.
Jack Knight 4 speed, Straight cut, dog engagement gear kit is permitted.


Front. Brake drums or Solid brake disc. Triumph Herald or Vauxhall Viva Lockheed twin piston brake calipers.

The front brake calipers are are available under the follwing Pt numbers.

Viva Lockheed CA132 Left Hand CA132R Right Hand. Triumph Girling CA2 Left Hand CA2R Right Hand.

There is also a Period replica Girling twin piston brake caliper available from Performance Braking based in Monmouth Tel 01600713117. or e mail The part no is 14LF and utilises 48mm pistons.

Rear: Brake drums.

Tandem master cylinder. Adjustable brake pedal box. As long as it cannot be adjusted by driver or navigator when normally seated.


Front. Negative camber bottom arms. Rear. Coil Spring, Telescopic shock absorbers.

Wheels and Tyres

Wheel rims, tyre size and profile as per MSA Blue book.

Due to shortage of 12″ forestry tyres it is allowed to run 65 profile forestry pattern tyres on 13″ rims.


The fitting of an air scoop on the rear wing to feed extra air into the carburetors is permitted.

Fibre glass bonnet or boot lid. Composite side and rear windows.

Alloy centrally mounted replacement petrol tank.

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