40 degrees initial!

depends on compression. low compression small blocks can like up to 42*. My 318 Duster now is at 40*, ET slip proven that's where it likes it. ALWAYS let the engine decide, not a pre-determined number on a piece of paper before the build even starts.
I don't need a lesson in power tuning. lol
I just through out a number that would surely be a close number, proven.