Do you know what compression ratio your set up has? I would try to be able to use 93 pump gas.. ) -10.2 ish- just for ease of operation and if you ever want to sell it you would have limited customers for 100 octane only and it’s a pain in the ass to live with that! …. couple posts ago you said yourself “The most important part is that they are Drivable” 100 octane only puts a limit on it…
I’m glad you took the head off and fix it properly..
When you get it back put the spark plugs in, flip it over and fill the chambers with gasoline… Just for the fun of it (and “trust but verify”)