Fuel blending question

I drove my newly acquired '72 'Cuda today, and am getting the feel of it bit by bit. As I was getting more aggressive with the throttle openings, I believe I heard some light knock "pinking" at around 3500+ RPM.
The motor is a 440>496 stroker with CR listed at 10.4:1 with Diamond pistons, iron heads and timing supposedly at 34 all in (will confirm once I get my timing light back in my hands).

Dyno sheets show conflicting fuel information, with both BP 93 and 100 listed on the sheet...

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Author: Flat-Tappet