Before the above date the Lotus model used a smaller 0.7" bore Brake Master Cylinder. ( From Sep 65 - 66 ). Here's a newBrake Master Cylinder. I can do much more on the phone.
Lotus Cortina Mk1 Jack
FORD LOTUS CORTINA Mk1 Mk2 (1962-70) NEW GLASS BOWL FUEL PUMP
Lotus Cortina Mk1 Air Filter Carburetor Back Plate steel as original
LOTUS TWIN CAM VALVE COTTER SET, LOTUS CORTINA, LOTUS ELAN. NEW
Escort Mk1 & Mk2, Lotus Cortina & Capri Gearbox Mount, Heavy Duty, Pinto Type 9
Ford Cortina Mk1 Windscreen & Rear Screen Plastic Chrome Moulding Trim Lotus GT