I've had both opinions as well. When Dad n I put new top end in the 273, I called a certain tech line and they said clearances get bigger(in our situation). I set them cold.
Mostly correct.^^^^^^^^^^^^^^^^^^^^^^^^^
I set mine cold at .010-.011 , alum. heads expand increasing the clearance about .006 . A friend that has been a mech all his life put me onto this, he said a lot of the alum. headed foriegn cars factories even recommend it . ALUM. .006 TIGHTER, CAST IRON .003 TIGHTER.
Have had no problems w/ it. Checked them a couple times , all good .
Solid roller------
