There are two A230 ratio sets, that I know of;
2.55-1.49-1.00, splits of .584-.671; and
3.08-1.70-1.00, splits of .552-.588; Check out all the splits.
I think the 2.55 was for V8s and the slanty got the other one, but don't quote me, Said AJ/Form.
The 'close' ratio came in the 340 and 383...