Its been mentioned before that there are various methods that you could use to line up different tracks and distances.

One is the Track record.
I have found this of limited use.
Another is perhaps an average of the 10 best times recorded.
This is slightly better.

Heres another useful way , but only contains Victorian tracks.
It is the GRV Tier 3 Times.

I'll send it in my next post.
Race coming up