Category 1 Cortina MK 1

 Permitted M----

+odifications supported by documented evidence

Engine.

1200cc 1500cc Pushrod. 1558cc Twin cam units.
The original Twin cam engine block may be changed for a 701M block but not the 711M.

Carburetors.

Single choke. Twin choke. Twin Weber or Dellorto´s.

Gearbox.

Four speed all cast iron gearbox. Alluminum clutch and gearbox rear casing. Dog boxes are not allowed.

Steering.

Steering box only. (Recirculating ball)

Suspension.

Front. Mc Pherson Strut. Non adjustable platforms. Anti/roll bar, narrow 2 bolt mounting points onto chassis. (Not wide 4 bolt like Escort ) Solid track control arms. Negative camber can be obtained by re-drilling the cross member.
Front strut brace.

Rear. Multi leaf spring. Vertical telescopic shock absorbers.

Brakes.

Front. 9.6 inch Solid front brake discs, P imperial or M metric two piston cast iron calipers.

Rear. Drum brake. Single piston wheel cylinders.

Rear Axle.

Three quarter floating half shafts. (Not Quaife units) Limited slip differentials. Aluminium differential casing. Trailing links. Three piece halfshafts are allowed.
You are also allowed to add additional strengthening from the differential casing out towards the wheels by welding supports to the axle casing.

Wheels and Tyres

Six inch rim size maximum.
70 profiles tyres minimum.

Fuel Tank.

Centrally mounted aluminum tank in boot allowed.

General.
Front and rear bumpers mustbe fitted.

Fibreglass bonnet and bootlid. Perspex side windows.