Quote:From the posts I think that my first guess was probably right.
There was a running change in the 70mm stroke cranks after a certain date & all of the A12, A12A & A13's used the same crankshaft since, with the exception of the bore size, they are all essentially the same short block. [Heads may differ]

I wonder if anyone in Australia has a post 1980 A12 engine in pieces & can confirm that their crank is the same.
I'd make a small wager that it is.

I do not believe that any A series engine came with a cast steel crank. All the ones I have seen have been forgings.
Should we expect anything less of the worlds best small pushrod Four???