Will I guess the low octane spark table would be the best timing in the worst conditions.

The optimal timing would be the best timing in the best conditions.

But the IAT would be normal, best conditions: 72,80degrees
Sea level, Octane gas?, ECT?

Is 91/93 octane gas required to run the optimum timing with the diffrent truck heads? A LS1 optimal timing is lower than the vortec optimal timing(I think).

My knock sensor dosent think I need high octane it thinks 87s fine with whatever timing, but I hear knock with any kind of raised timing without 93 octane.

I might be overlooking something simple, but I don't see how a load on the motor would make it knock. Besides the fact that it might lower the rpms causing mabey more airmass in the cylinders.

I never see knock in the low end at wot. I always see it from around 3800-5200 and sometimes up.