318 1/8 time improvement

There are more factors involved than just octane when it comes to detonation.
I know that but the gas is a big factor and the air / fuel ratios , timing etc. I don't remember the cranking pressure , I would have to look at the build and dyno sheets. I would like to see the bearings after a couple hundred runs at 12.5 to 1 compression on pump gas !!! I just got my carb back from AED maybe I should have sent it to your guy.