What octane should I run

I'm about a week out from putting my 471 back on the Dyno after nearly a year of being apart and doing a few more things for the betterment of it. My compression

(WAS) at 11.6:1 and I was running 108, I was running a fairly small camshaft 260-264 @.050 .
(NOW )
the cam is still small, just a little bigger 264-268 @.050 & the compression ratio is 12.8:1.
I'll be running the car at 1000 feet elevation & the dynamic compression is 9.5:1 if that matters.
Anyways I just need a safe octane number.
Thank you.