Thank you all for the further information you provided. I really appreciate this.
I will let you know what will happen to this block. If it can be bored to 73.5 I will have done this, if not it'll become a 1293.
But this has to wait for the moment as I first have to invest time in my other 1380 engine that suffered a crank or conrod bearing failure. This engine is still in the car.