Ok, guys, I have followed this advise for years, my 82 is set at 8 or 10 because it was set for a small shot. Runs 12.90 or so like this, carbed, na.
In an alternate world I visit regularly, people say to run 14 to 18 deg base timing, limit 36 or so, and the 350 in my 66 Chevelle works fine...