Nicks Garage, 572 HEMI, Here we go....

Wasn't it a locked distributor?

You’re not paying attention.
There is an ignition advance curve programmed into the box.

If you can’t access the curve in the box to see what it is(need a laptop), then the only way you’ll really know what the timing is doing at high rpm is to put a light on it…….. and run it up to the upper limit of the test.