After all that hard work it all came down to this moment, would it run or would all that effort have been for nothing?

Well as you can see in the video it took a few attempts to get the engine running, mostly due to the lack of fuel in the carburettors, but as soon as it fired up it ran just fine. We had to abort the break-in a couple of times because the engine temperature got alarmingly high, this is not uncommon though with rebuilt engines as all the new parts need to wear in.

After the break-in was completed, i.e. 15 minutes at 2500-3000rpm, the engine oil was drained and the oil filter replaced. Now I need to re-adjust the valve clearance, set the timing and balance the carburettors.