Power now went up to 135bhp gross, as a result of the engine's bore being increased by one eighth of an inch, which meant the engine size increased to 215cubic inches, from 199.
There were other improvements undertaken to the engine around the same time, including increasing the size of the oil cooler, but the big difference was the move from timing chain, to timing gears. Dad always thought this a much better idea, after all gears don't break as chains can, I know this to my own cost, when the timing chain on my Land Rover 2.25 diesel broke, mangling the engine!
By 1968, the air compressor was driven via a belt off the back of the engine, beneath a protective cover. These belts did have a habit of…