I have only run 93 octane in my small block and I have had no problems so far. It is 10.9 com. with aluminum heads. Cam is 255/266 @.050. Cranking cylinder pressure is 190-200.

1.33 60 ft,6.21 at 110.59 in the 1/8, pump gas small block,2950lbs,drag radials,mufflers and driven to track ...