How tight to set solid lifters

I’ll say it again. I have never, ever seen an iron/iron combination need LOOSER lash cold. Ever.

Thats another stupid myth that won’t die. Iron grows when heated Just like aluminum. It just doesn’t grow as much.

Check it for yourself. Set them loose cold, get it hot and see where they are. Then you will know for sure.
Of course they are looser cold. Start a engine up cold and the solids clatter. As the engine warms up, the lash tightens and the clatter goes away. Yes, they need to be a little looser if you adjust them cold.