Spark plug and timing recommend

I have had smallblocks that liked 32 best, one that liked 40. Know of friends combo's
that ran best at 40 as well.
Current motor runs best at 35
Moral of the story, you have to play around in a couple of outings to see what it wants. Nothing is set in stone. Or play on dyno

This is great advice and one of the reasons why I always dyno every combo