79C10 - What is your compression ratio?

OK guys - Help me out with the theory -

Pre-detonation is caused by excessive pressure before spark as opposed to pre-ignition caused by over advanced timing?

Throttleing up advances timing perhaps to a pre-ignition state?

Would pre-detonation occur at lower RPM also or only when reved up?

So you need to ritchen mixture or use a slower burning fuel to handle pre-detonation?
OR
Spark is occuring too soon so retard the timing to handle pre-ignition?

Which would you try first?
I'm guessing timing.

Bert