Target compression ratio A/J

@ 10.1 static... an ivc of around 54 , dynamic roughly 8.5 175psi would work nice imo and will run 89 octane...but never leave you hurting if the gas is crummy.
I've run as high as 8.88 dynamic on 91 octane, if the gas ain't fresh it will occasionally run on a second when you turn the key off...If I use STP/Lucas octane boost, no run on....if I out 100 in it , smooth and deepens the exhaust note...so I consider 8.88 the MAX for MY COMBO....it varies from build to build/parts combo what the limit is....so thats why I never try and say "this IS the max ,period" I like to say "ive run as high as" or "run" this dynamic.
You could push the dynamic up high...but do you need to is the question.