Question, does it have aluminum or cast iron heads?
Close is about all your gonna get till you can figure out just how much growth your dealing with.
I would to set them all on .011 to 010 cold.
Start it, let it get good & warm, re-set them 'hot' let it cool, check again.
Make note of the lash 'cold' - then you you can set them 'cold' all the time.
On my motor, BBC 496 W/ cast iron heads.
I set all mine @ .022 cold, calls for 28 and 30 hot, never had any issues.
Cp