Plug readers

Are they out of the same cylinder? I ask because the ground wire on the second plug looks like it has a very lean area around the plug. Maybe. The first plug doesn’t have that.

I like the first plug better. You’ve got the idle and cruise about nailed.

Are you using ported or manifold vacuum for the vacuum advance?
No they are not from same cylinder. First plug is from cyl#3 and
second plug is from cyl# 8
Using manifold vacuum